| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1521 |
91.3%
|
| 2 | SOME DIFFICULTY | 81 |
4.9%
|
| 3 | A LOT OF DIFFICULTY | 7 |
0.4%
|
| Sysmiss | 57 |
3.4%
|