| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2560 |
74.8%
|
| 2 | SOME DIFFICULTY | 619 |
18.1%
|
| 3 | A LOT OF DIFFICULTY | 66 |
1.9%
|
| 4 | CANNOT LEARN THINGS AT ALL | 2 |
0.1%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 175 |
5.1%
|