| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2330 |
90.1%
|
| 2 | SOME DIFFICULTY | 236 |
9.1%
|
| 3 | A LOT OF DIFFICULTY | 12 |
0.5%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 7 |
0.3%
|
| 9 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 6830 |