| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 2677 |
95.8%
|
| 2 | SOME DIFFICULTY | 43 |
1.5%
|
| 3 | A LOT OF DIFFICULTY | 4 |
0.1%
|
| Sysmiss | 70 |
2.5%
|