| Value | Category |
|---|---|
| 10 | minimally corr. |
| 11 | minimally corr. |
| 12 | minimally corr. |
| 19 | other mini. corr |
| 20 | part. corr. |
| 29 | other part corr. |
| 30 | complete |
| 31 | complete |
| 39 | other complete |
| 70 | incorrect |
| 71 | incorrect |
| 79 | other incorrect |
| 90 | crossed out,... |
| 98 | not admin. |
| 99 | missing |
| 101 | .A |