| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 4964 | 
                                    
                                    28.4%
                                 | 
| 3 | No | 10866 | 
                                    
                                    62.1%
                                 | 
| 8 | DK | 1654 | 
                                    
                                    9.5%
                                 | 
| Sysmiss | 7443 |