| Value | Category | Cases | |
|---|---|---|---|
| 1 | Seventh grade | 624 |
29%
|
| 2 | Eighth grade | 574 |
26.7%
|
| 3 | Ninth grade | 456 |
21.2%
|
| 4 | Tenth grade | 495 |
23%
|
| Sysmiss | 12 |