| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3638 |
93.5%
|
| 2 | SOME DIFFICULTY | 235 |
6%
|
| 3 | A LOT OF DIFFICULTY | 13 |
0.3%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 4 |
0.1%
|
| 9 | NO RESPONSE | 0 |
0%
|
| Sysmiss | 7 |