| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    1%
                                 | 
| -8 | Refusal (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Yes | 1 | 
                                    
                                    1%
                                 | 
| 2 | No | 100 | 
                                    
                                    98%
                                 | 
| Sysmiss | 922 |