| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 18 | 
                                    
                                    10.1%
                                 | 
| 2 | No | 120 | 
                                    
                                    67.4%
                                 | 
| 3 | Don't know | 40 | 
                                    
                                    22.5%
                                 | 
| Sysmiss | 687 |