| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 170 | 
                                    
                                    29%
                                 | 
| 2 | No | 409 | 
                                    
                                    69.7%
                                 | 
| 9 | Missing | 8 | 
                                    
                                    1.4%
                                 | 
| Sysmiss | 596 |