| Value | Category | 
                                    
                    
                        | -9 | -9. Don't know | 
                                    
                    
                        | -8 | -8. Refused | 
                                    
                    
                        | -5 | -5. Not Applicable | 
                                    
                    
                        | -3 | -3. Missing | 
                                    
                    
                        | -2 | -2. Not asked in Phase 2 | 
                                    
                    
                        | 1 | 1. Yes | 
                                    
                    
                        | 2 | 2. No | 
                                    
                    
                        | 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.