| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1699 |
93.1%
|
| 2 | SOME DIFFICULTY | 29 |
1.6%
|
| 3 | A LOT OF DIFFICULTY | 5 |
0.3%
|
| 9 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 90 |
4.9%
|