| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 | 
                                    
                                    25.8%
                                 | 
| 1 | Yes | 47 | 
                                    
                                    48.5%
                                 | 
| 2 | No | 25 | 
                                    
                                    25.8%
                                 |