| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    0.5%
                                 | 
| 1 | Yes | 262 | 
                                    
                                    27.4%
                                 | 
| 2 | No | 688 | 
                                    
                                    72%
                                 |