| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    2.7%
                                 | 
| 1 | Yes | 43 | 
                                    
                                    38.7%
                                 | 
| 2 | No | 65 | 
                                    
                                    58.6%
                                 |