| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 |  | 
                                    
                    
                        | 2 |  | 
                                    
                    
                        | 3 |  | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 6 |  | 
                                    
                    
                        | 7 |  | 
                                    
                    
                        | 8 |  | 
                                    
                    
                        | 9 |  | 
                                    
                    
                        | 10 |  | 
                                    
                    
                        | 11 |  | 
                                    
                    
                        | 12 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 22 |  | 
                                    
                    
                        | 27 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 32 |  | 
                                    
                    
                        | 37 |  | 
                                    
                    
                        | 52 |  | 
                                    
                    
                        | 61 |  | 
                                    
                    
                        | 62 |  | 
                                    
                    
                        | 70 |  | 
                                    
                    
                        | 71 |  | 
                                    
                    
                        | 72 |  | 
                                    
                    
                        | 91 |  | 
                                    
                    
                        | 92 |  | 
                                    
                    
                        | 96 |  | 
                                    
                    
                        | 97 |  | 
                                    
                    
                        | 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.