| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 1487 | 
                                    
                                    18%
                                 | 
| 1 | yes | 6746 | 
                                    
                                    81.9%
                                 | 
| 9 | 6 | 
                                    
                                    0.1%
                                 |