| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 1174 |
36.3%
|
| 2 | 8th grade (8 preparatory class) | 1058 |
32.7%
|
| 3 | 9th grade (8 after preparatory class, I course) | 1001 |
31%
|
| Sysmiss | 80 |