| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 360 |
26.5%
|
| 2 | 8th grade | 348 |
25.6%
|
| 3 | 9th grade | 321 |
23.6%
|
| 4 | 10th grade | 330 |
24.3%
|
| Sysmiss | 20 |