| Value | Category | 
                                    
                    
                        | 27 |  | 
                                    
                    
                        | 30 |  | 
                                    
                    
                        | 31 |  | 
                                    
                    
                        | 32 |  | 
                                    
                    
                        | 33 |  | 
                                    
                    
                        | 34 |  | 
                                    
                    
                        | 35 |  | 
                                    
                    
                        | 36 |  | 
                                    
                    
                        | 37 |  | 
                                    
                    
                        | 38 |  | 
                                    
                    
                        | 39 |  | 
                                    
                    
                        | 40 |  | 
                                    
                    
                        | 41 |  | 
                                    
                    
                        | 42 |  | 
                                    
                    
                        | 43 |  | 
                                    
                    
                        | 44 |  | 
                                    
                    
                        | 45 |  | 
                                    
                    
                        | 46 |  | 
                                    
                    
                        | 47 |  | 
                                    
                    
                        | 48 |  | 
                                    
                    
                        | 49 |  | 
                                    
                    
                        | 50 |  | 
                                    
                    
                        | 51 |  | 
                                    
                    
                        | 53 |  | 
                                    
                    
                        | -9 | don't know | 
                            
            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.