| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 2638 | 
                                    
                                    70.5%
                                 | 
| 1 | yes | 767 | 
                                    
                                    20.5%
                                 | 
| 8 | dk | 336 | 
                                    
                                    9%
                                 | 
| Sysmiss | 11205 |