| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 7133 |
91.2%
|
| 2 | SOME DIFFICULTY | 604 |
7.7%
|
| 3 | A LOT OF DIFFICULTY | 36 |
0.5%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 17 |
0.2%
|
| Sysmiss | 34 |
0.4%
|