| Value | Category | 
                                    
                    
                        | 1 | 1. Very bad | 
                                    
                    
                        | 2 | 2. Bad | 
                                    
                    
                        | 3 | 3. Neither bad nor good | 
                                    
                    
                        | 4 | 4. Ok | 
                                    
                    
                        | 5 | 5. Good | 
                                    
                    
                        | 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.