| Value | Category | Cases | |
|---|---|---|---|
| 1 | 6th grade primary | 1 |
0.1%
|
| 2 | 1st grade secondary | 33 |
2.7%
|
| 3 | 2nd grade secondary | 365 |
29.8%
|
| 4 | 3rd grade secondary | 453 |
36.9%
|
| 5 | 4th grade secondary | 373 |
30.4%
|
| 6 | 5th grade secondary | 1 |
0.1%
|
| Sysmiss | 8 |