| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3516 |
55.6%
|
| 2 | SOME DIFFICULTY | 160 |
2.5%
|
| 3 | A LOT OF DIFFICULTY | 22 |
0.3%
|
| 4 | CANNOT LEARN THINGS AT ALL | 8 |
0.1%
|
| 9 | NO RESPONSE | 10 |
0.2%
|
| Sysmiss | 2612 |