| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 272 | 
                                    
                                    10.5%
                                 | 
| 2 | no | 2310 | 
                                    
                                    89.3%
                                 | 
| 8 | dk | 4 | 
                                    
                                    0.2%
                                 | 
| Sysmiss | 12765 |