| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 4524 |
80.7%
|
| 2 | SOME DIFFICULTY | 311 |
5.5%
|
| 3 | A LOT OF DIFFICULTY | 19 |
0.3%
|
| 4 | CANNOT REMEMBER/CONCENTRATE AT ALL | 2 |
0%
|
| Sysmiss | 749 |
13.4%
|