| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 551 | 
                                    
                                    89.4%
                                 | 
| 2 | no | 61 | 
                                    
                                    9.9%
                                 | 
| 8 | dk | 4 | 
                                    
                                    0.6%
                                 | 
| Sysmiss | 14735 |