| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 | 
                                    
                                    9%
                                 | 
| 1 | Yes | 29 | 
                                    
                                    26.1%
                                 | 
| 2 | No | 72 | 
                                    
                                    64.9%
                                 |