| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1887 |
83.1%
|
| 2 | SOME DIFFICULTY | 304 |
13.4%
|
| 3 | A LOT OF DIFFICULTY | 59 |
2.6%
|
| 4 | CANNOT LEARN THINGS AT ALL | 11 |
0.5%
|
| Sysmiss | 11 |
0.5%
|