| Value | Category | 
                                    
                    
                        | -9 | No answer | 
                                    
                    
                        | -7 | Not sure | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | Yes | 
                                    
                    
                        | 2 | No | 
                                    
                    
                        | 7 |  | 
                                    
                    
                        | 9 |  | 
                                    
                    
                        | 17 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 54 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 70 |  | 
                                    
                    
                        | 80 |  | 
                                    
                    
                        | 95 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 105 |  | 
                                    
                    
                        | 115 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 126 |  | 
                                    
                    
                        | 144 |  | 
                                    
                    
                        | 150 |  | 
                                    
                    
                        | 160 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 190 |  | 
                                    
                    
                        | 200 |  | 
                                    
                    
                        | 210 |  | 
                                    
                    
                        | 220 |  | 
                                    
                    
                        | 225 |  | 
                                    
                    
                        | 230 |  | 
                                    
                    
                        | 240 |  | 
                                    
                    
                        | 250 |  | 
                                    
                    
                        | 280 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 320 |  | 
                                    
                    
                        | 330 |  | 
                                    
                    
                        | 340 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 370 |  | 
                                    
                    
                        | 390 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 430 |  | 
                                    
                    
                        | 440 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 460 |  | 
                                    
                    
                        | 475 |  | 
                                    
                    
                        | 480 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 504 |  | 
                                    
                    
                        | 507 |  | 
                                    
                    
                        | 540 |  | 
                                    
                    
                        | 550 |  | 
                                    
                    
                        | 559 |  | 
                                    
                    
                        | 576 |  | 
                                    
                    
                        | 580 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 620 |  | 
                                    
                    
                        | 625 |  | 
                                    
                    
                        | 640 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 670 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 720 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 780 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 810 |  | 
                                    
                    
                        | 835 |  | 
                                    
                    
                        | 840 |  | 
                                    
                    
                        | 860 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 920 |  | 
                                    
                    
                        | 930 |  | 
                                    
                    
                        | 950 |  | 
                                    
                    
                        | 960 |  | 
                                    
                    
                        | 975 |  | 
                                    
                    
                        | 990 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1050 |  | 
                                    
                    
                        | 1100 |  | 
                                    
                    
                        | 1120 |  | 
                                    
                    
                        | 1140 |  | 
                                    
                    
                        | 1150 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1215 |  | 
                                    
                    
                        | 1220 |  | 
                                    
                    
                        | 1280 |  | 
                                    
                    
                        | 1290 |  | 
                                    
                    
                        | 1300 |  | 
                                    
                    
                        | 1305 |  | 
                                    
                    
                        | 1320 |  | 
                                    
                    
                        | 1344 |  | 
                                    
                    
                        | 1350 |  | 
                                    
                    
                        | 1395 |  | 
                                    
                    
                        | 1400 |  | 
                                    
                    
                        | 1440 |  | 
                                    
                    
                        | 1450 |  | 
                                    
                    
                        | 1470 |  | 
                                    
                    
                        | 1488 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1510 |  | 
                                    
                    
                        | 1550 |  | 
                                    
                    
                        | 1575 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1620 |  | 
                                    
                    
                        | 1650 |  | 
                                    
                    
                        | 1680 |  | 
                                    
                    
                        | 1700 |  | 
                                    
                    
                        | 1750 |  | 
                                    
                    
                        | 1770 |  | 
                                    
                    
                        | 1780 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 1810 |  | 
                                    
                    
                        | 1845 |  | 
                                    
                    
                        | 1875 |  | 
                                    
                    
                        | 1900 |  | 
                                    
                    
                        | 1950 |  | 
                                    
                    
                        | 1970 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 2010 |  | 
                                    
                    
                        | 2025 |  | 
                                    
                    
                        | 2050 |  | 
                                    
                    
                        | 2100 |  | 
                                    
                    
                        | 2160 |  | 
                                    
                    
                        | 2170 |  | 
                                    
                    
                        | 2200 |  | 
                                    
                    
                        | 2250 |  | 
                                    
                    
                        | 2280 |  | 
                                    
                    
                        | 2300 |  | 
                                    
                    
                        | 2325 |  | 
                                    
                    
                        | 2340 |  | 
                                    
                    
                        | 2394 |  | 
                                    
                    
                        | 2400 |  | 
                                    
                    
                        | 2436 |  | 
                                    
                    
                        | 2460 |  | 
                                    
                    
                        | 2500 |  | 
                                    
                    
                        | 2550 |  | 
                                    
                    
                        | 2580 |  | 
                                    
                    
                        | 2600 |  | 
                                    
                    
                        | 2650 |  | 
                                    
                    
                        | 2660 |  | 
                                    
                    
                        | 2680 |  | 
                                    
                    
                        | 2700 |  | 
                                    
                    
                        | 2709 |  | 
                                    
                    
                        | 2720 |  | 
                                    
                    
                        | 2730 |  | 
                                    
                    
                        | 2760 |  | 
                                    
                    
                        | 2800 |  | 
                                    
                    
                        | 2820 |  | 
                                    
                    
                        | 2825 |  | 
                                    
                    
                        | 2850 |  | 
                                    
                    
                        | 2860 |  | 
                                    
                    
                        | 2880 |  | 
                                    
                    
                        | 2900 |  | 
                                    
                    
                        | 2940 |  | 
                                    
                    
                        | 2950 |  | 
                                    
                    
                        | 2960 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 3020 |  | 
                                    
                    
                        | 3050 |  | 
                                    
                    
                        | 3053 |  | 
                                    
                    
                        | 3100 |  | 
                                    
                    
                        | 3120 |  | 
                                    
                    
                        | 3150 |  | 
                                    
                    
                        | 3180 |  | 
                                    
                    
                        | 3200 |  | 
                                    
                    
                        | 3275 |  | 
                                    
                    
                        | 3280 |  | 
                                    
                    
                        | 3300 |  | 
                                    
                    
                        | 3311 |  | 
                                    
                    
                        | 3354 |  | 
                                    
                    
                        | 3390 |  | 
                                    
                    
                        | 3400 |  | 
                                    
                    
                        | 3420 |  | 
                                    
                    
                        | 3425 |  | 
                                    
                    
                        | 3450 |  | 
                                    
                    
                        | 3480 |  | 
                                    
                    
                        | 3500 |  | 
                                    
                    
                        | 3550 |  | 
                                    
                    
                        | 3600 |  | 
                                    
                    
                        | 3608 |  | 
                                    
                    
                        | 3700 |  | 
                                    
                    
                        | 3760 |  | 
                                    
                    
                        | 3800 |  | 
                                    
                    
                        | 3840 |  | 
                                    
                    
                        | 3857 |  | 
                                    
                    
                        | 3870 |  | 
                                    
                    
                        | 3900 |  | 
                                    
                    
                        | 3920 |  | 
                                    
                    
                        | 3950 |  | 
                                    
                    
                        | 3978 |  | 
                                    
                    
                        | 3990 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4105 |  | 
                                    
                    
                        | 4200 |  | 
                                    
                    
                        | 4300 |  | 
                                    
                    
                        | 4360 |  | 
                                    
                    
                        | 4370 |  | 
                                    
                    
                        | 4386 |  | 
                                    
                    
                        | 4400 |  | 
                                    
                    
                        | 4450 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 4588 |  | 
                                    
                    
                        | 4600 |  | 
                                    
                    
                        | 4640 |  | 
                                    
                    
                        | 4670 |  | 
                                    
                    
                        | 4680 |  | 
                                    
                    
                        | 4700 |  | 
                                    
                    
                        | 4786 |  | 
                                    
                    
                        | 4800 |  | 
                                    
                    
                        | 4836 |  | 
                                    
                    
                        | 4850 |  | 
                                    
                    
                        | 4900 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 5080 |  | 
                                    
                    
                        | 5100 |  | 
                                    
                    
                        | 5125 |  | 
                                    
                    
                        | 5200 |  | 
                                    
                    
                        | 5230 |  | 
                                    
                    
                        | 5250 |  | 
                                    
                    
                        | 5300 |  | 
                                    
                    
                        | 5304 |  | 
                                    
                    
                        | 5330 |  | 
                                    
                    
                        | 5360 |  | 
                                    
                    
                        | 5400 |  | 
                                    
                    
                        | 5410 |  | 
                                    
                    
                        | 5460 |  | 
                                    
                    
                        | 5500 |  | 
                                    
                    
                        | 5525 |  | 
                                    
                    
                        | 5580 |  | 
                                    
                    
                        | 5600 |  | 
                                    
                    
                        | 5640 |  | 
                                    
                    
                        | 5650 |  | 
                                    
                    
                        | 5680 |  | 
                                    
                    
                        | 5700 |  | 
                                    
                    
                        | 5775 |  | 
                                    
                    
                        | 5800 |  | 
                                    
                    
                        | 5964 |  | 
                                    
                    
                        | 5969 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 6100 |  | 
                                    
                    
                        | 6160 |  | 
                                    
                    
                        | 6164 |  | 
                                    
                    
                        | 6200 |  | 
                                    
                    
                        | 6240 |  | 
                                    
                    
                        | 6250 |  | 
                                    
                    
                        | 6273 |  | 
                                    
                    
                        | 6274 |  | 
                                    
                    
                        | 6300 |  | 
                                    
                    
                        | 6380 |  | 
                                    
                    
                        | 6390 |  | 
                                    
                    
                        | 6400 |  | 
                                    
                    
                        | 6500 |  | 
                                    
                    
                        | 6507 |  | 
                                    
                    
                        | 6525 |  | 
                                    
                    
                        | 6590 |  | 
                                    
                    
                        | 6600 |  | 
                                    
                    
                        | 6675 |  | 
                                    
                    
                        | 6700 |  | 
                                    
                    
                        | 6800 |  | 
                                    
                    
                        | 6810 |  | 
                                    
                    
                        | 6900 |  | 
                                    
                    
                        | 6950 |  | 
                                    
                    
                        | 7000 |  | 
                                    
                    
                        | 7050 |  | 
                                    
                    
                        | 7100 |  | 
                                    
                    
                        | 7120 |  | 
                                    
                    
                        | 7140 |  | 
                                    
                    
                        | 7200 |  | 
                                    
                    
                        | 7300 |  | 
                                    
                    
                        | 7400 |  | 
                                    
                    
                        | 7470 |  | 
                                    
                    
                        | 7500 |  | 
                                    
                    
                        | 7530 |  | 
                                    
                    
                        | 7560 |  | 
                                    
                    
                        | 7568 |  | 
                                    
                    
                        | 7600 |  | 
                                    
                    
                        | 7625 |  | 
                                    
                    
                        | 7644 |  | 
                                    
                    
                        | 7700 |  | 
                                    
                    
                        | 7800 |  | 
                                    
                    
                        | 7900 |  | 
                                    
                    
                        | 7950 |  | 
                                    
                    
                        | 7970 |  | 
                                    
                    
                        | 8000 |  | 
                                    
                    
                        | 8100 |  | 
                                    
                    
                        | 8120 |  | 
                                    
                    
                        | 8200 |  | 
                                    
                    
                        | 8300 |  | 
                                    
                    
                        | 8400 |  | 
                                    
                    
                        | 8450 |  | 
                                    
                    
                        | 8480 |  | 
                                    
                    
                        | 8500 |  | 
                                    
                    
                        | 8600 |  | 
                                    
                    
                        | 8666 |  | 
                                    
                    
                        | 8700 |  | 
                                    
                    
                        | 8750 |  | 
                                    
                    
                        | 8800 |  | 
                                    
                    
                        | 8820 |  | 
                                    
                    
                        | 8900 |  | 
                                    
                    
                        | 8950 |  | 
                                    
                    
                        | 9000 |  | 
                                    
                    
                        | 9052 |  | 
                                    
                    
                        | 9100 |  | 
                                    
                    
                        | 9200 |  | 
                                    
                    
                        | 9225 |  | 
                                    
                    
                        | 9250 |  | 
                                    
                    
                        | 9282 |  | 
                                    
                    
                        | 9300 |  | 
                                    
                    
                        | 9320 |  | 
                                    
                    
                        | 9350 |  | 
                                    
                    
                        | 9400 |  | 
                                    
                    
                        | 9450 |  | 
                                    
                    
                        | 9500 |  | 
                                    
                    
                        | 9529 |  | 
                                    
                    
                        | 9600 |  | 
                                    
                    
                        | 9640 |  | 
                                    
                    
                        | 9780 |  | 
                                    
                    
                        | 9865 |  | 
                                    
                    
                        | 9915 |  | 
                                    
                    
                        | 9960 |  | 
                                    
                    
                        | 9980 |  | 
                                    
                    
                        | 10000 |  | 
                                    
                    
                        | 10120 |  | 
                                    
                    
                        | 10200 |  | 
                                    
                    
                        | 10260 |  | 
                                    
                    
                        | 10400 |  | 
                                    
                    
                        | 10462 |  | 
                                    
                    
                        | 10500 |  | 
                                    
                    
                        | 10600 |  | 
                                    
                    
                        | 10700 |  | 
                                    
                    
                        | 10800 |  | 
                                    
                    
                        | 10850 |  | 
                                    
                    
                        | 10900 |  | 
                                    
                    
                        | 11000 |  | 
                                    
                    
                        | 11025 |  | 
                                    
                    
                        | 11240 |  | 
                                    
                    
                        | 11300 |  | 
                                    
                    
                        | 11440 |  | 
                                    
                    
                        | 11500 |  | 
                                    
                    
                        | 11610 |  | 
                                    
                    
                        | 11900 |  | 
                                    
                    
                        | 12000 |  | 
                                    
                    
                        | 12100 |  | 
                                    
                    
                        | 12300 |  | 
                                    
                    
                        | 12350 |  | 
                                    
                    
                        | 12500 |  | 
                                    
                    
                        | 12650 |  | 
                                    
                    
                        | 12700 |  | 
                                    
                    
                        | 12800 |  | 
                                    
                    
                        | 12880 |  | 
                                    
                    
                        | 13000 |  | 
                                    
                    
                        | 13040 |  | 
                                    
                    
                        | 13200 |  | 
                                    
                    
                        | 13400 |  | 
                                    
                    
                        | 13500 |  | 
                                    
                    
                        | 13550 |  | 
                                    
                    
                        | 13600 |  | 
                                    
                    
                        | 13800 |  | 
                                    
                    
                        | 13820 |  | 
                                    
                    
                        | 14000 |  | 
                                    
                    
                        | 14100 |  | 
                                    
                    
                        | 14190 |  | 
                                    
                    
                        | 14200 |  | 
                                    
                    
                        | 14247 |  | 
                                    
                    
                        | 14300 |  | 
                                    
                    
                        | 14400 |  | 
                                    
                    
                        | 14500 |  | 
                                    
                    
                        | 14600 |  | 
                                    
                    
                        | 14640 |  | 
                                    
                    
                        | 14700 |  | 
                                    
                    
                        | 14850 |  | 
                                    
                    
                        | 15000 |  | 
                                    
                    
                        | 15200 |  | 
                                    
                    
                        | 15280 |  | 
                                    
                    
                        | 15500 |  | 
                                    
                    
                        | 15700 |  | 
                                    
                    
                        | 15850 |  | 
                                    
                    
                        | 16000 |  | 
                                    
                    
                        | 16300 |  | 
                                    
                    
                        | 16340 |  | 
                                    
                    
                        | 16380 |  | 
                                    
                    
                        | 16394 |  | 
                                    
                    
                        | 16500 |  | 
                                    
                    
                        | 17000 |  | 
                                    
                    
                        | 17150 |  | 
                                    
                    
                        | 17180 |  | 
                                    
                    
                        | 17200 |  | 
                                    
                    
                        | 18000 |  | 
                                    
                    
                        | 18100 |  | 
                                    
                    
                        | 18106 |  | 
                                    
                    
                        | 18256 |  | 
                                    
                    
                        | 18350 |  | 
                                    
                    
                        | 18500 |  | 
                                    
                    
                        | 19000 |  | 
                                    
                    
                        | 19500 |  | 
                                    
                    
                        | 20000 |  | 
                                    
                    
                        | 20500 |  | 
                                    
                    
                        | 20600 |  | 
                                    
                    
                        | 20700 |  | 
                                    
                    
                        | 21000 |  | 
                                    
                    
                        | 21012 |  | 
                                    
                    
                        | 21080 |  | 
                                    
                    
                        | 21300 |  | 
                                    
                    
                        | 21370 |  | 
                                    
                    
                        | 22000 |  | 
                                    
                    
                        | 23000 |  | 
                                    
                    
                        | 23490 |  | 
                                    
                    
                        | 23676 |  | 
                                    
                    
                        | 24000 |  | 
                                    
                    
                        | 25000 |  | 
                                    
                    
                        | 25200 |  | 
                                    
                    
                        | 27000 |  | 
                                    
                    
                        | 28000 |  | 
                                    
                    
                        | 28500 |  | 
                                    
                    
                        | 28700 |  | 
                                    
                    
                        | 29500 |  | 
                                    
                    
                        | 30000 |  | 
                                    
                    
                        | 30500 |  | 
                                    
                    
                        | 30800 |  | 
                                    
                    
                        | 31000 |  | 
                                    
                    
                        | 32000 |  | 
                                    
                    
                        | 32500 |  | 
                                    
                    
                        | 33000 |  | 
                                    
                    
                        | 35000 |  | 
                                    
                    
                        | 35500 |  | 
                                    
                    
                        | 37000 |  | 
                                    
                    
                        | 37500 |  | 
                                    
                    
                        | 38000 |  | 
                                    
                    
                        | 40000 |  | 
                                    
                    
                        | 40900 |  | 
                                    
                    
                        | 44000 |  | 
                                    
                    
                        | 45000 |  | 
                                    
                    
                        | 56000 |  | 
                                    
                    
                        | 60000 |  | 
                                    
                    
                        | 65200 |  | 
                                    
                    
                        | 80000 |  | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.