| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 90 | 
                                    
                                    33.8%
                                 | 
| 2 | no | 173 | 
                                    
                                    65%
                                 | 
| 3 | (dk) | 1 | 
                                    
                                    0.4%
                                 | 
| 4 | (ref) | 2 | 
                                    
                                    0.8%
                                 | 
| Sysmiss | 2734 |