| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 56 | 
                                    
                                    20.9%
                                 | 
| 2 | no | 209 | 
                                    
                                    78%
                                 | 
| 3 | (dk) | 3 | 
                                    
                                    1.1%
                                 | 
| 4 | (ref) | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 2732 |