| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    4.5%
                                 | 
| 1 | Yes | 32 | 
                                    
                                    28.8%
                                 | 
| 2 | No | 74 | 
                                    
                                    66.7%
                                 |