| Value | Category | Cases | |
|---|---|---|---|
| 1 | 8 grade of elementary school | 1951 |
36.6%
|
| 2 | 9 grade of elementary school | 1676 |
31.5%
|
| 3 | 1 grade of high school | 1701 |
31.9%
|
| Sysmiss | 18 |