| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2360 |
91.2%
|
| 2 | SOME DIFFICULTY | 206 |
8%
|
| 3 | A LOT OF DIFFICULTY | 9 |
0.3%
|
| 4 | CANNOT CONCENTRATE AT ALL | 8 |
0.3%
|
| 9 | NO RESPONSE | 4 |
0.2%
|
| Sysmiss | 6830 |