| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 884 |
56.5%
|
| 2 | SOME DIFFICULTY | 48 |
3.1%
|
| 3 | A LOT OF DIFFICULTY | 4 |
0.3%
|
| 4 | CANNOT LEARN THINGS AT ALL | 1 |
0.1%
|
| Sysmiss | 627 |
40.1%
|