| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | No | 320 | 
                                    
                                    26.7%
                                 | 
| 1 | Yes | 880 | 
                                    
                                    73.3%
                                 | 
| 9 | Can't determine | 0 | 
                                    
                                    0%
                                 |