| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 6105 |
60.1%
|
| 2 | SOME DIFFICULTY | 66 |
0.6%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0%
|
| 9 | NO RESPONSE | 10 |
0.1%
|
| Sysmiss | 3970 |
39.1%
|