| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 10 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 25 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 35 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 65 |  | 
                                    
                    
                        | 70 |  | 
                                    
                    
                        | 75 |  | 
                                    
                    
                        | 80 |  | 
                                    
                    
                        | 90 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 110 |  | 
                                    
                    
                        | 112 |  | 
                                    
                    
                        | 115 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 125 |  | 
                                    
                    
                        | 130 |  | 
                                    
                    
                        | 135 |  | 
                                    
                    
                        | 140 |  | 
                                    
                    
                        | 145 |  | 
                                    
                    
                        | 150 |  | 
                                    
                    
                        | 160 |  | 
                                    
                    
                        | 170 |  | 
                                    
                    
                        | 175 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 190 |  | 
                                    
                    
                        | 200 |  | 
                                    
                    
                        | 205 |  | 
                                    
                    
                        | 210 |  | 
                                    
                    
                        | 215 |  | 
                                    
                    
                        | 220 |  | 
                                    
                    
                        | 225 |  | 
                                    
                    
                        | 228 |  | 
                                    
                    
                        | 240 |  | 
                                    
                    
                        | 250 |  | 
                                    
                    
                        | 260 |  | 
                                    
                    
                        | 265 |  | 
                                    
                    
                        | 275 |  | 
                                    
                    
                        | 280 |  | 
                                    
                    
                        | 290 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 305 |  | 
                                    
                    
                        | 310 |  | 
                                    
                    
                        | 315 |  | 
                                    
                    
                        | 320 |  | 
                                    
                    
                        | 325 |  | 
                                    
                    
                        | 330 |  | 
                                    
                    
                        | 335 |  | 
                                    
                    
                        | 340 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 365 |  | 
                                    
                    
                        | 370 |  | 
                                    
                    
                        | 375 |  | 
                                    
                    
                        | 380 |  | 
                                    
                    
                        | 390 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 410 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 425 |  | 
                                    
                    
                        | 428 |  | 
                                    
                    
                        | 440 |  | 
                                    
                    
                        | 444 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 456 |  | 
                                    
                    
                        | 460 |  | 
                                    
                    
                        | 465 |  | 
                                    
                    
                        | 480 |  | 
                                    
                    
                        | 490 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 505 |  | 
                                    
                    
                        | 520 |  | 
                                    
                    
                        | 530 |  | 
                                    
                    
                        | 540 |  | 
                                    
                    
                        | 550 |  | 
                                    
                    
                        | 564 |  | 
                                    
                    
                        | 575 |  | 
                                    
                    
                        | 590 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 620 |  | 
                                    
                    
                        | 625 |  | 
                                    
                    
                        | 630 |  | 
                                    
                    
                        | 635 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 660 |  | 
                                    
                    
                        | 670 |  | 
                                    
                    
                        | 675 |  | 
                                    
                    
                        | 680 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 720 |  | 
                                    
                    
                        | 730 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 780 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 840 |  | 
                                    
                    
                        | 875 |  | 
                                    
                    
                        | 880 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 920 |  | 
                                    
                    
                        | 960 |  | 
                                    
                    
                        | 975 |  | 
                                    
                    
                        | 980 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1100 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1250 |  | 
                                    
                    
                        | 1440 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 2147483625 | don't know | 
                                    
                    
                        | 2147483639 | refusal | 
                                    
                    
                        | 2147483640 | skipped | 
                                    
                    
                        | 2147483645 | .x. censored | 
                                    
                    
                        | 10001 | .D | 
                            
            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.