| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 421 |
51.9%
|
| 2 | SOME DIFFICULTY | 27 |
3.3%
|
| 3 | A LOT OF DIFFICULTY | 3 |
0.4%
|
| 4 | CANNOT UNDERSTAND AT ALL | 1 |
0.1%
|
| Sysmiss | 359 |
44.3%
|