| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 7240 | 
                                    
                                    49.6%
                                 | 
| 1 | yes | 6637 | 
                                    
                                    45.4%
                                 | 
| 8 | don't know | 734 | 
                                    
                                    5%
                                 | 
| Sysmiss | 335 |