| Value | Category | 
                                    
                    
                        | 1 | always | 
                                    
                    
                        | 2 | to a large extent | 
                                    
                    
                        | 3 | some extent | 
                                    
                    
                        | 4 | hardly | 
                                    
                    
                        | 5 | never | 
                                    
                    
                        | 6 | don't know | 
                                    
                    
                        | 98 | refused | 
                                    
                    
                        | 99 | missing data | 
                            
            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.