| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1598 |
87.6%
|
| 2 | SOME DIFFICULTY | 116 |
6.4%
|
| 3 | A LOT OF DIFFICULTY | 17 |
0.9%
|
| 4 | CANNOT LEARN THINGS AT ALL | 1 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 90 |
4.9%
|