| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1567 |
85.9%
|
| 2 | SOME DIFFICULTY | 148 |
8.1%
|
| 3 | A LOT OF DIFFICULTY | 17 |
0.9%
|
| 9 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 90 |
4.9%
|