| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 65 |  | 
                                    
                    
                        | 80 |  | 
                                    
                    
                        | 93 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 104 |  | 
                                    
                    
                        | 110 |  | 
                                    
                    
                        | 118 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 130 |  | 
                                    
                    
                        | 135 |  | 
                                    
                    
                        | 150 |  | 
                                    
                    
                        | 155 |  | 
                                    
                    
                        | 164 |  | 
                                    
                    
                        | 168 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 190 |  | 
                                    
                    
                        | 200 |  | 
                                    
                    
                        | 210 |  | 
                                    
                    
                        | 220 |  | 
                                    
                    
                        | 230 |  | 
                                    
                    
                        | 240 |  | 
                                    
                    
                        | 250 |  | 
                                    
                    
                        | 260 |  | 
                                    
                    
                        | 268 |  | 
                                    
                    
                        | 270 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 360 |  | 
                                    
                    
                        | 382 |  | 
                                    
                    
                        | 386 |  | 
                                    
                    
                        | 397 |  | 
                                    
                    
                        | 400 |  | 
                                    
                    
                        | 490 |  | 
                                    
                    
                        | 500 |  | 
                                    
                    
                        | 530 |  | 
                                    
                    
                        | 550 |  | 
                                    
                    
                        | 580 |  | 
                                    
                    
                        | 600 |  | 
                                    
                    
                        | 650 |  | 
                                    
                    
                        | 680 |  | 
                                    
                    
                        | 700 |  | 
                                    
                    
                        | 750 |  | 
                                    
                    
                        | 800 |  | 
                                    
                    
                        | 900 |  | 
                                    
                    
                        | 990 |  | 
                                    
                    
                        | 1000 |  | 
                                    
                    
                        | 1200 |  | 
                                    
                    
                        | 1300 |  | 
                                    
                    
                        | 1500 |  | 
                                    
                    
                        | 1600 |  | 
                                    
                    
                        | 1800 |  | 
                                    
                    
                        | 2000 |  | 
                                    
                    
                        | 4000 |  | 
                                    
                    
                        | 2147483625 | don't know | 
                                    
                    
                        | 2147483639 | refusal | 
                                    
                    
                        | 2147483640 | skipped | 
                                    
                    
                        | 2147483645 | .x. censored | 
                                    
                    
                        | 10001 | .D | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.