| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 13619 |
92.7%
|
| 2 | SOME DIFFICULTY | 721 |
4.9%
|
| 3 | A LOT OF DIFFICULTY | 105 |
0.7%
|
| 4 | CANNOT LEARN THINGS AT ALL | 37 |
0.3%
|
| 9 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 205 |
1.4%
|