| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    15.4%
                                 | 
| 1 | Yes | 6 | 
                                    
                                    46.2%
                                 | 
| 2 | No | 5 | 
                                    
                                    38.5%
                                 | 
| Sysmiss | 942 |