| Value | Category | Cases | |
|---|---|---|---|
| 1 | 7th grade of elementary school | 385 |
35.5%
|
| 2 | 8th grade of elementary school | 308 |
28.4%
|
| 3 | 1st grade of high school | 393 |
36.2%
|
| Sysmiss | 5 |