| Value | Category | 
                                    
                    
                        | -9 | No answer | 
                                    
                    
                        | -7 | Not sure | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | Yes | 
                                    
                    
                        | 2 | No | 
                                    
                    
                        | 7 |  | 
                                    
                    
                        | 9 |  | 
                                    
                    
                        | 10 |  | 
                                    
                    
                        | 11 |  | 
                                    
                    
                        | 13 |  | 
                                    
                    
                        | 15 |  | 
                                    
                    
                        | 19 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 23 |  | 
                                    
                    
                        | 25 |  | 
                                    
                    
                        | 28 |  | 
                                    
                    
                        | 29 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 31 |  | 
                                    
                    
                        | 32 |  | 
                                    
                    
                        | 33 |  | 
                                    
                    
                        | 35 |  | 
                                    
                    
                        | 37 |  | 
                                    
                    
                        | 38 |  | 
                                    
                    
                        | 39 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 42 |  | 
                                    
                    
                        | 43 |  | 
                                    
                    
                        | 45 |  | 
                                    
                    
                        | 47 |  | 
                                    
                    
                        | 48 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 51 |  | 
                                    
                    
                        | 52 |  | 
                                    
                    
                        | 54 |  | 
                                    
                    
                        | 55 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 61 |  | 
                                    
                    
                        | 64 |  | 
                                    
                    
                        | 65 |  | 
                                    
                    
                        | 67 |  | 
                                    
                    
                        | 68 |  | 
                                    
                    
                        | 69 |  | 
                                    
                    
                        | 70 |  | 
                                    
                    
                        | 77 |  | 
                                    
                    
                        | 78 |  | 
                                    
                    
                        | 79 |  | 
                                    
                    
                        | 80 |  | 
                                    
                    
                        | 85 |  | 
                                    
                    
                        | 86 |  | 
                                    
                    
                        | 88 |  | 
                                    
                    
                        | 89 |  | 
                                    
                    
                        | 90 |  | 
                                    
                    
                        | 95 |  | 
                                    
                    
                        | 98 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 102 |  | 
                                    
                    
                        | 110 |  | 
                                    
                    
                        | 112 |  | 
                                    
                    
                        | 115 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 122 |  | 
                                    
                    
                        | 123 |  | 
                                    
                    
                        | 124 |  | 
                                    
                    
                        | 125 |  | 
                                    
                    
                        | 126 |  | 
                                    
                    
                        | 130 |  | 
                                    
                    
                        | 133 |  | 
                                    
                    
                        | 135 |  | 
                                    
                    
                        | 143 |  | 
                                    
                    
                        | 150 |  | 
                                    
                    
                        | 155 |  | 
                                    
                    
                        | 160 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 188 |  | 
                                    
                    
                        | 200 |  | 
                                    
                    
                        | 203 |  | 
                                    
                    
                        | 210 |  | 
                                    
                    
                        | 220 |  | 
                                    
                    
                        | 230 |  | 
                                    
                    
                        | 232 |  | 
                                    
                    
                        | 240 |  | 
                                    
                    
                        | 250 |  | 
                                    
                    
                        | 251 |  | 
                                    
                    
                        | 260 |  | 
                                    
                    
                        | 270 |  | 
                                    
                    
                        | 280 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 320 |  | 
                                    
                    
                        | 330 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 380 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 430 |  | 
                                    
                    
                        | 435 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 460 |  | 
                                    
                    
                        | 480 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 550 |  | 
                                    
                    
                        | 575 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 641 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 850 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1050 |  | 
                                    
                    
                        | 1100 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1350 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1700 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 1900 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 2200 |  | 
                                    
                    
                        | 2300 |  | 
                                    
                    
                        | 2400 |  | 
                                    
                    
                        | 2500 |  | 
                                    
                    
                        | 2700 |  | 
                                    
                    
                        | 2800 |  | 
                                    
                    
                        | 3000 |  | 
                                    
                    
                        | 3400 |  | 
                                    
                    
                        | 3600 |  | 
                                    
                    
                        | 3700 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 4300 |  | 
                                    
                    
                        | 4400 |  | 
                                    
                    
                        | 4500 |  | 
                                    
                    
                        | 4700 |  | 
                                    
                    
                        | 4800 |  | 
                                    
                    
                        | 5000 |  | 
                                    
                    
                        | 6000 |  | 
                                    
                    
                        | 8000 |  | 
                                    
                    
                        | 10000 |  | 
                            
            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.