| Value | Category | Cases | |
|---|---|---|---|
| 0 | no | 3375 |
18.3%
|
| 1 | yes | 11733 |
63.8%
|
| 8 | dk | 3273 |
17.8%
|
| 9 | 12 |
0.1%
|
|
| 11 | .Z | 361 |