| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6763 |
75.4%
|
| 2 | SOME DIFFICULTY | 1761 |
19.6%
|
| 3 | A LOT OF DIFFICULTY | 391 |
4.4%
|
| 4 | CANNOT LEARN THINGS AT ALL | 26 |
0.3%
|
| 9 | NO RESPONSE | 5 |
0.1%
|
| Sysmiss | 19 |
0.2%
|