| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 441 |
72.8%
|
| 2 | SOME DIFFICULTY | 27 |
4.5%
|
| 3 | A LOT OF DIFFICULTY | 3 |
0.5%
|
| 4 | CANNOT CONCENTRATE AT ALL | 1 |
0.2%
|
| 9 | NO RESPONSE | 2 |
0.3%
|
| Sysmiss | 132 |
21.8%
|