| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade of elementary school | 442 |
30.2%
|
| 2 | 8th grade of elementary school | 612 |
41.7%
|
| 3 | 1st grade of high school | 412 |
28.1%
|
| Sysmiss | 11 |