| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1935 |
66.1%
|
| 2 | SOME DIFFICULTY | 166 |
5.7%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0.2%
|
| 9 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 821 |
28%
|