| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 286 | 
                                    
                                    42.6%
                                 | 
| 2 | no | 351 | 
                                    
                                    52.2%
                                 | 
| 3 | (dk) | 32 | 
                                    
                                    4.8%
                                 | 
| 4 | (ref) | 3 | 
                                    
                                    0.4%
                                 | 
| Sysmiss | 2328 |