| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| -7 | Does not apply (spontaneous) | 2 | 
                                    
                                    1.3%
                                 | 
| 1 | Yes | 16 | 
                                    
                                    10.7%
                                 | 
| 2 | No | 132 | 
                                    
                                    88%
                                 |