| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 653 |
94%
|
| 2 | Some difficulty | 38 |
5.5%
|
| 3 | A lot of difficulty | 0 |
0%
|
| 4 | Cannot learn things at all | 4 |
0.6%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 428 |