| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 10476 | 
                                    
                                    70.2%
                                 | 
| 1 | yes | 4350 | 
                                    
                                    29.1%
                                 | 
| 8 | don't know | 102 | 
                                    
                                    0.7%
                                 | 
| Sysmiss | 18 |