| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    0.7%
                                 | 
| -7 | Does not apply (spontaneous) | 7 | 
                                    
                                    1.7%
                                 | 
| 1 | Yes | 208 | 
                                    
                                    51.9%
                                 | 
| 2 | No | 183 | 
                                    
                                    45.6%
                                 | 
| Sysmiss | 554 |