| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 1361 |
33.8%
|
| 2 | 8th grade (8 preparatory class) | 1398 |
34.7%
|
| 3 | 9th grade (8 after preparatory class, I course) | 1267 |
31.5%
|
| Sysmiss | 16 |