| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3618 |
95%
|
| 2 | SOME DIFFICULTY | 165 |
4.3%
|
| 3 | A LOT OF DIFFICULTY | 17 |
0.4%
|
| 4 | CANNOT LEARN THINGS AT ALL | 3 |
0.1%
|
| 9 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 2462 |