| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade | 415 |
30.9%
|
| 2 | 8th grade | 259 |
19.3%
|
| 3 | 9th grade | 320 |
23.8%
|
| 4 | 10th grade | 350 |
26%
|
| Sysmiss | 4 |