| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 |  | 
                                    
                    
                        | 2 |  | 
                                    
                    
                        | 3 |  | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 6 |  | 
                                    
                    
                        | 7 |  | 
                                    
                    
                        | 8 |  | 
                                    
                    
                        | 15 |  | 
                                    
                    
                        | 18 |  | 
                                    
                    
                        | 19 |  | 
                                    
                    
                        | 21 |  | 
                                    
                    
                        | 22 |  | 
                                    
                    
                        | 23 |  | 
                                    
                    
                        | 25 |  | 
                                    
                    
                        | 27 |  | 
                                    
                    
                        | 28 |  | 
                                    
                    
                        | 29 |  | 
                                    
                    
                        | 32 |  | 
                                    
                    
                        | 38 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 43 |  | 
                                    
                    
                        | 44 |  | 
                                    
                    
                        | 45 |  | 
                                    
                    
                        | 46 |  | 
                                    
                    
                        | 47 |  | 
                                    
                    
                        | 48 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 96 |  | 
                                    
                    
                        | 99 |  | 
                                    
                    
                        | 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.