| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2226 |
70.5%
|
| 2 | SOME DIFFICULTY | 251 |
8%
|
| 3 | A LOT OF DIFFICULTY | 16 |
0.5%
|
| 9 | NO RESPONSE | 4 |
0.1%
|
| Sysmiss | 660 |
20.9%
|