| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 23 | 
                                    
                                    2.6%
                                 | 
| 1 | Yes, fully | 177 | 
                                    
                                    20.2%
                                 | 
| 2 | Yes, partially | 63 | 
                                    
                                    7.2%
                                 | 
| 3 | No | 612 | 
                                    
                                    69.9%
                                 | 
| Sysmiss | 123 |