| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 702 |
89.5%
|
| 2 | SOME DIFFICULTY | 54 |
6.9%
|
| 3 | A LOT OF DIFFICULTY | 4 |
0.5%
|
| 4 | CANNOT CONCENTRATE AT ALL | 2 |
0.3%
|
| 9 | NO RESPONSE | 2 |
0.3%
|
| Sysmiss | 20 |
2.6%
|