| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1778 | 
                                    
                                    47.5%
                                 | 
| 1 | gave but don't know times | 1482 | 
                                    
                                    39.6%
                                 | 
| 8 | don't know | 481 | 
                                    
                                    12.9%
                                 | 
| Sysmiss | 11205 |