| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6895 |
89.2%
|
| 2 | SOME DIFFICULTY | 68 |
0.9%
|
| 3 | A LOT OF DIFFICULTY | 7 |
0.1%
|
| 9 | NO RESPONSE | 3 |
0%
|
| Sysmiss | 759 |
9.8%
|