| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    
| -8 | Refusal (spontaneous) | 18 | 
                                                                 
                                    
                                    18%
                                 
                                                             | 
                                                        
                    
| 1 | Yes | 19 | 
                                                                 
                                    
                                    19%
                                 
                                                             | 
                                                        
                    
| 2 | No | 60 | 
                                                                 
                                    
                                    60%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 672 |