| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 4549 | 
                                    
                                    90%
                                 | 
| 1 | yes | 502 | 
                                    
                                    9.9%
                                 | 
| 8 | dk | 0 | 
                                    
                                    0%
                                 | 
| 9 | 1 | 
                                    
                                    0%
                                 | |
| 11 | .Z | 3187 |