| Value | Category | 
                                    
                    
                        | 0 |  | 
                                    
                    
                        | 1 | Yes, of course | 
                                    
                    
                        | 2 | Perhaps | 
                                    
                    
                        | 3 | No | 
                                    
                    
                        | 4 | Do not know | 
                                    
                    
                        | 5 | Does not apply to the person | 
                                    
                    
                        | Sysmiss |  | 
                            
            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.