| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1508 |
53.4%
|
| 2 | SOME DIFFICULTY | 93 |
3.3%
|
| 3 | A LOT OF DIFFICULTY | 4 |
0.1%
|
| 4 | CANNOT UNDERSTAND AT ALL | 1 |
0%
|
| Sysmiss | 1218 |
43.1%
|