| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 9103 |
81.8%
|
| 2 | SOME DIFFICULTY | 638 |
5.7%
|
| 3 | A LOT OF DIFFICULTY | 43 |
0.4%
|
| 4 | CANNOT REMEMBER/CONCENTRATE AT ALL | 2 |
0%
|
| 9 | NO RESPONSE | 8 |
0.1%
|
| Sysmiss | 1341 |