| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 391 | 
                                    
                                    37.5%
                                 | 
| 1 | yes | 627 | 
                                    
                                    60.1%
                                 | 
| 8 | dk | 25 | 
                                    
                                    2.4%
                                 | 
| Sysmiss | 13903 |