| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 |  | 
                                    
                    
                        | 2 |  | 
                                    
                    
                        | 3 |  | 
                                    
                    
                        | 4 |  | 
                                    
                    
                        | 5 |  | 
                                    
                    
                        | 8 |  | 
                                    
                    
                        | 10 |  | 
                                    
                    
                        | 12 |  | 
                                    
                    
                        | 13 |  | 
                                    
                    
                        | 14 |  | 
                                    
                    
                        | 15 |  | 
                                    
                    
                        | 20 |  | 
                                    
                    
                        | 21 |  | 
                                    
                    
                        | 24 |  | 
                                    
                    
                        | 26 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 36 |  | 
                                    
                    
                        | 39 |  | 
                                    
                    
                        | 48 |  | 
                                    
                    
                        | 60 |  | 
                                    
                    
                        | 90 |  | 
                                    
                    
                        | 100 |  | 
                                    
                    
                        | 168 |  | 
                                    
                    
                        | 180 |  | 
                                    
                    
                        | 290 |  | 
                                    
                    
                        | 310 |  | 
                                    
                    
                        | 365 |  | 
                                    
                    
                        | 547 |  | 
                                    
                    
                        | 730 |  | 
                                    
                    
                        | 999 | omitted | 
                            
            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.