| Value | Category | Cases | |
|---|---|---|---|
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 0 | 9 | 
                                    
                                    22%
                                 | |
| 1 | 26 | 
                                    
                                    63.4%
                                 | |
| 2 | 6 | 
                                    
                                    14.6%
                                 | |
| Sysmiss | 914 |