| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1378 |
47.1%
|
| 2 | SOME DIFFICULTY | 303 |
10.4%
|
| 3 | A LOT OF DIFFICULTY | 17 |
0.6%
|
| 4 | CANNOT LEARN THINGS AT ALL | 4 |
0.1%
|
| Sysmiss | 1223 |
41.8%
|