| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 62 | 
                                    
                                    28.8%
                                 | 
| 1 | Yes | 110 | 
                                    
                                    51.2%
                                 | 
| 2 | No | 43 | 
                                    
                                    20%
                                 |