| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4771 |
53.6%
|
| 2 | SOME DIFFICULTY | 582 |
6.5%
|
| 3 | A LOT OF DIFFICULTY | 52 |
0.6%
|
| 4 | CANNOT UNDERSTOOD AT ALL | 9 |
0.1%
|
| Sysmiss | 3489 |
39.2%
|