| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1673 |
91.7%
|
| 2 | SOME DIFFICULTY | 57 |
3.1%
|
| 3 | A LOT OF DIFFICULTY | 3 |
0.2%
|
| 9 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 90 |
4.9%
|