| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3518 |
87%
|
| 2 | SOME DIFFICULTY | 485 |
12%
|
| 3 | A LOT OF DIFFICULTY | 39 |
1%
|
| 4 | CANNOT REMEMBER OR CONCENTRATE AT ALL | 0 |
0%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1470 |