| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 123 | 
                                    
                                    33.4%
                                 | 
| 2 | no | 241 | 
                                    
                                    65.5%
                                 | 
| 3 | (dk) | 3 | 
                                    
                                    0.8%
                                 | 
| 4 | (ref) | 1 | 
                                    
                                    0.3%
                                 | 
| Sysmiss | 2632 |