| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 19534 |
87%
|
| 2 | SOME DIFFICULTY | 2589 |
11.5%
|
| 3 | A LOT OF DIFFICULTY | 306 |
1.4%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 23 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 252 |