| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 41 | 
                                    
                                    13.8%
                                 | 
| 2 | no | 254 | 
                                    
                                    85.5%
                                 | 
| 8 | dk | 2 | 
                                    
                                    0.7%
                                 | 
| Sysmiss | 15054 |