| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 4012 | 
                                    
                                    65.5%
                                 | 
| 1 | yes | 2107 | 
                                    
                                    34.4%
                                 | 
| 9 | 8 | 
                                    
                                    0.1%
                                 | |
| 11 | .Z | 2112 |