| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 | 
                                    
                                    3.6%
                                 | 
| 1 | Yes | 44 | 
                                    
                                    39.6%
                                 | 
| 2 | No | 63 | 
                                    
                                    56.8%
                                 |