| Value | Category |
|---|---|
| 10 | minimally correct |
| 11 | minimally correct |
| 19 | other mini. corr |
| 20 | partially corr. |
| 30 | complete resp. |
| 39 | other compl. resp |
| 70 | incor. resp. |
| 71 | incor. resp. |
| 76 | incor. resp. |
| 79 | other incorr. resp. |
| 90 | crossed out,... |
| 98 | not admin. |
| 99 | missing |
| 101 | .A |