| Value | Category | 
                                    
                    
                        | 1 | 1. Very healthy | 
                                    
                    
                        | 2 | 2. S/what healthy | 
                                    
                    
                        | 3 | 3. S/what unhealthy | 
                                    
                    
                        | 4 | 4. Unhealthy | 
                                    
                    
                        | 8 | 8. DK | 
                                    
                    
                        | 9 | 9. Miss | 
                            
            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.