| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 734 |
87.5%
|
| 2 | SOME DIFFICULTY | 30 |
3.6%
|
| 3 | A LOT OF DIFFICULTY | 2 |
0.2%
|
| 4 | CANNOT CONCENTRATE AT ALL | 1 |
0.1%
|
| 9 | NO RESPONSE | 4 |
0.5%
|
| Sysmiss | 68 |
8.1%
|