| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 3771 |
60.2%
|
| 2 | SOME DIFFICULTY | 29 |
0.5%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0.1%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 2462 |
39.3%
|