| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3518 |
63.8%
|
| 2 | SOME DIFFICULTY | 485 |
8.8%
|
| 3 | A LOT OF DIFFICULTY | 39 |
0.7%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 1470 |
26.7%
|