| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2356 |
87.6%
|
| 2 | SOME DIFFICULTY | 20 |
0.7%
|
| 3 | A LOT OF DIFFICULTY | 2 |
0.1%
|
| 9 | NO RESPONSE | 3 |
0.1%
|
| Sysmiss | 310 |
11.5%
|