| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 5007 |
93.4%
|
| 2 | SOME DIFFICULTY | 312 |
5.8%
|
| 3 | A LOT OF DIFFICULTY | 31 |
0.6%
|
| 4 | CANNOT CONCENTRATE AT ALL | 9 |
0.2%
|
| 9 | NO RESPONSE | 0 |
0%
|
| Sysmiss | 1 |