| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 12 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 13 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 14 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 15 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 16 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 21 | 
                          | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 995 | 
                        None  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 997 | 
                        Can't remember  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 999 | 
                        Don't know/Didn't say  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 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.