| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2287 |
88.4%
|
| 2 | SOME DIFFICULTY | 273 |
10.6%
|
| 3 | A LOT OF DIFFICULTY | 17 |
0.7%
|
| 4 | CANNOT LEARN THINGS AT ALL | 7 |
0.3%
|
| 9 | NO RESPONSE | 3 |
0.1%
|
| Sysmiss | 6830 |