| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 3527 |
88.9%
|
| 2 | Some difficulty | 363 |
9.2%
|
| 3 | A lot of difficulty | 72 |
1.8%
|
| 4 | Cannot learn things at all | 4 |
0.1%
|
| 9 | No response | 1 |
0%
|
| Sysmiss | 362 |