| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2276 |
61%
|
| 2 | SOME DIFFICULTY | 63 |
1.7%
|
| 3 | A LOT OF DIFFICULTY | 3 |
0.1%
|
| 4 | CANNOT LEARN THINGS AT ALL | 3 |
0.1%
|
| Sysmiss | 1384 |
37.1%
|