| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2005 |
92.5%
|
| 2 | SOME DIFFICULTY | 153 |
7.1%
|
| 3 | A LOT OF DIFFICULTY | 6 |
0.3%
|
| 4 | CANNOT LEARN THINGS AT ALL | 3 |
0.1%
|
| 9 | NO RESPONSE | 0 |
0%
|
| Sysmiss | 1385 |