| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | No | 6137 | 
                                    
                                    11.9%
                                 | 
| 1 | Yes | 45312 | 
                                    
                                    87.8%
                                 | 
| 9 | Can't determine | 138 | 
                                    
                                    0.3%
                                 |