| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing data | 1 | 
                                    
                                    0%
                                 | 
| 0 | No | 20877 | 
                                    
                                    82.2%
                                 | 
| 1 | Yes | 4123 | 
                                    
                                    16.2%
                                 | 
| 9 | Can't determine | 396 | 
                                    
                                    1.6%
                                 |