| Value | Category | 
                                    
                    
                        | -5 | Missing; Not asked by the interviewer | 
                                    
                    
                        | -4 | Not asked in survey | 
                                    
                    
                        | -3 | Not applicable | 
                                    
                    
                        | -2 | No answer | 
                                    
                    
                        | -1 | Don´t know | 
                                    
                    
                        | 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.