| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 6 | 
                                    
                                    3.7%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 1 | Yes | 12 | 
                                    
                                    7.4%
                                 | 
| 2 | No | 144 | 
                                    
                                    88.9%
                                 | 
| Sysmiss | 793 |