| Value | Category | 
                                    
                    
                        | 1 | 1. Definitely Yes | 
                                    
                    
                        | 2 | 2. Probably Yes | 
                                    
                    
                        | 3 | 3. Probably No | 
                                    
                    
                        | 4 | 4. Definitely No | 
                                    
                    
                        | 8 | 8. Refused | 
                                    
                    
                        | 9 | 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.