| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 | 
                                    
                                    7.2%
                                 | 
| -7 | Does not apply (spontaneous) | 4 | 
                                    
                                    3.6%
                                 | 
| 1 | Yes | 12 | 
                                    
                                    10.8%
                                 | 
| 2 | No | 87 | 
                                    
                                    78.4%
                                 |