| Value | 
                    Category | 
                                                                            
                                    
                    
                        | 0 | 
                        0. yes  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 1 | 
                        1. no  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2147483622 | 
                        .a. Don't Know  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2147483623 | 
                        .b. Refused  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2147483624 | 
                        .c. Invalid skip  | 
                        
                            
                        
                        
                        
                        
                            
                    
                                    
                    
                        | 2147483627 | 
                        .f. Not applicable  | 
                        
                            
                        
                        
                        
                        
                            
                    
                            
            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.