| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1044 |
84.4%
|
| 2 | SOME DIFFICULTY | 171 |
13.8%
|
| 3 | A LOT OF DIFFICULTY | 13 |
1.1%
|
| 4 | CANNOT LEARN THINGS AT ALL | 3 |
0.2%
|
| 9 | NO RESPONSE | 6 |
0.5%
|
| Sysmiss | 6757 |