| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | Yes | 21 | 
                                    
                                    14%
                                 | 
| 2 | No | 129 | 
                                    
                                    86%
                                 |