| Value | Category | Cases | |
|---|---|---|---|
| 6 | 6th grade | 20 |
13.5%
|
| 7 | 7th grade | 23 |
15.5%
|
| 8 | 8th grade | 33 |
22.3%
|
| 9 | 9th grade | 35 |
23.6%
|
| 10 | 10th grade | 37 |
25%
|
| Sysmiss | 508 |