| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3614 |
95.7%
|
| 2 | SOME DIFFICULTY | 101 |
2.7%
|
| 3 | A LOT OF DIFFICULTY | 8 |
0.2%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 8 |
0.2%
|
| Sysmiss | 45 |
1.2%
|