| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1840 |
63.1%
|
| 2 | SOME DIFFICULTY | 123 |
4.2%
|
| 3 | A LOT OF DIFFICULTY | 8 |
0.3%
|
| 9 | NO RESPONSE | 2 |
0.1%
|
| Sysmiss | 943 |
32.3%
|