| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 14 | 
                                    
                                    6%
                                 | 
| 1 | Yes | 178 | 
                                    
                                    76.4%
                                 | 
| 2 | No | 41 | 
                                    
                                    17.6%
                                 | 
| Sysmiss | 127 |