| Value | Category | Cases | |
|---|---|---|---|
| 1 | VI | 1351 |
26.9%
|
| 2 | VII | 1333 |
26.5%
|
| 3 | VIII | 1009 |
20.1%
|
| 4 | First grade of secondary school | 1333 |
26.5%
|
| Sysmiss | 172 |