| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 3137 | 
                                    
                                    76.2%
                                 | 
| 1 | yes | 980 | 
                                    
                                    23.8%
                                 | 
| 9 | 1 | 
                                    
                                    0%
                                 | |
| 11 | .Z | 4121 |