| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 54 | 
                                    
                                    16.7%
                                 | 
| 2 | No | 266 | 
                                    
                                    82.1%
                                 | 
| 3 | Do not know | 1 | 
                                    
                                    0.3%
                                 | 
| 9 | Unspecified | 3 | 
                                    
                                    0.9%
                                 | 
| Sysmiss | 9675 |