| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4824 |
54.2%
|
| 2 | SOME DIFFICULTY | 554 |
6.2%
|
| 3 | A LOT OF DIFFICULTY | 35 |
0.4%
|
| 4 | CANNOT UNDERSTAND AT ALL | 1 |
0%
|
| Sysmiss | 3489 |
39.2%
|