| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 2289 | 
                                    
                                    26.3%
                                 | 
| 1 | gave but don't know times | 5745 | 
                                    
                                    65.9%
                                 | 
| 8 | don't know | 683 | 
                                    
                                    7.8%
                                 | 
| Sysmiss | 6229 |