| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 296 | 
                                    
                                    13.5%
                                 | 
| 2 | no | 1881 | 
                                    
                                    86%
                                 | 
| 8 | dk | 9 | 
                                    
                                    0.4%
                                 | 
| Sysmiss | 13165 |