| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 191 | 
                                    
                                    28.4%
                                 | 
| 2 | no | 466 | 
                                    
                                    69.3%
                                 | 
| 3 | (dk) | 10 | 
                                    
                                    1.5%
                                 | 
| 4 | (ref) | 5 | 
                                    
                                    0.7%
                                 | 
| Sysmiss | 2328 |