| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3515 |
56.5%
|
| 2 | SOME DIFFICULTY | 234 |
3.8%
|
| 3 | A LOT OF DIFFICULTY | 13 |
0.2%
|
| 4 | CANNOT LEARN THINGS AT ALL | 4 |
0.1%
|
| 9 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 2453 |
39.4%
|