| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 1 | 
                                    
                                    0.1%
                                 | 
| 1 | Yes | 448 | 
                                    
                                    31%
                                 | 
| 2 | No | 997 | 
                                    
                                    68.9%
                                 | 
| Sysmiss | 689 |