| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4658 |
87.9%
|
| 2 | SOME DIFFICULTY | 289 |
5.5%
|
| 3 | A LOT OF DIFFICULTY | 45 |
0.8%
|
| 4 | CANNOT CONCENTRATE AT ALL | 6 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 301 |
5.7%
|