| Value | Category | 
                                    
                    
                        | 2 |  | 
                                    
                    
                        | 12 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 24 |  | 
                                    
                    
                        | 25 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 48 |  | 
                                    
                    
                        | 75 |  | 
                                    
                    
                        | 81 |  | 
                                    
                    
                        | 96 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 108 |  | 
                                    
                    
                        | 140 |  | 
                                    
                    
                        | 280 |  | 
                                    
                    
                        | 350 |  | 
                                    
                    
                        | 420 |  | 
                                    
                    
                        | 432 |  | 
                                    
                    
                        | 560 |  | 
                                    
                    
                        | 840 |  | 
                                    
                    
                        | 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.