| Value | Category | 
                                    
                    
                        | 15 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 22.5 |  | 
                                    
                    
                        | 25 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 35 |  | 
                                    
                    
                        | 36 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 45 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 65 |  | 
                                    
                    
                        | 70 |  | 
                                    
                    
                        | 74 |  | 
                                    
                    
                        | 75 |  | 
                                    
                    
                        | 80 |  | 
                                    
                    
                        | 90 |  | 
                                    
                    
                        | 95 |  | 
                                    
                    
                        | 96 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 110 |  | 
                                    
                    
                        | 120 |  | 
                                    
                    
                        | 145 |  | 
                                    
                    
                        | 300 |  | 
                                    
                    
                        | 450 |  | 
                                    
                    
                        | 9999998 | refusal | 
                                    
                    
                        | 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.