| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 521 | 
                                    
                                    22.4%
                                 | 
| 2 | no | 1790 | 
                                    
                                    76.9%
                                 | 
| 3 | (dk) | 17 | 
                                    
                                    0.7%
                                 | 
| 4 | (ref) | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 672 |