| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 2 | 
                                    
                                    0%
                                 | 
| 0 | No | 5396 | 
                                    
                                    21.2%
                                 | 
| 1 | Yes | 19747 | 
                                    
                                    77.8%
                                 | 
| 9 | Can't determine | 252 | 
                                    
                                    1%
                                 |