| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 16044 |
92.3%
|
| 2 | SOME DIFFICULTY | 1066 |
6.1%
|
| 3 | A LOT OF DIFFICULTY | 212 |
1.2%
|
| 4 | CANNOT REMEMBER THINGS AT ALL | 37 |
0.2%
|
| 9 | NO RESPONSE | 17 |
0.1%
|
| Sysmiss | 168 |