| Value | Category | Cases | |
|---|---|---|---|
| 1 | 6th grade | 368 |
18.1%
|
| 2 | 7th grade | 594 |
29.3%
|
| 3 | 8th grade | 555 |
27.4%
|
| 4 | 9th grade | 512 |
25.2%
|
| Sysmiss | 20 |