| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 908 |
58.1%
|
| 2 | SOME DIFFICULTY | 27 |
1.7%
|
| 3 | A LOT OF DIFFICULTY | 1 |
0.1%
|
| 4 | CANNOT UNDERSTAND AT ALL | 1 |
0.1%
|
| Sysmiss | 627 |
40.1%
|