| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 83 | 
                                    
                                    13.7%
                                 | 
| 2 | no | 518 | 
                                    
                                    85.5%
                                 | 
| 3 | (dk) | 5 | 
                                    
                                    0.8%
                                 | 
| 4 | (ref) | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 2394 |