| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 5651 |
79%
|
| 2 | SOME DIFFICULTY | 1272 |
17.8%
|
| 3 | A LOT OF DIFFICULTY | 103 |
1.4%
|
| 4 | CANNOT CONCENTRATE AT ALL | 6 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 121 |
1.7%
|