| Value | Category | 
                                    
                    
                        | 1 | 1. Definitely yes | 
                                    
                    
                        | 2 | 2. Probably yes | 
                                    
                    
                        | 3 | 3. Probably no | 
                                    
                    
                        | 4 | 4. Definitely no | 
                                    
                    
                        | 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.