| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3674 |
59%
|
| 2 | SOME DIFFICULTY | 82 |
1.3%
|
| 3 | A LOT OF DIFFICULTY | 11 |
0.2%
|
| 9 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 2453 |
39.4%
|