| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 738 |
94.1%
|
| 2 | SOME DIFFICULTY | 21 |
2.7%
|
| 3 | A LOT OF DIFFICULTY | 3 |
0.4%
|
| Sysmiss | 22 |
2.8%
|