| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    2.4%
                                 | 
| -8 | Refusal (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Yes | 2 | 
                                    
                                    1.6%
                                 | 
| 2 | No | 122 | 
                                    
                                    96.1%
                                 | 
| Sysmiss | 828 |