| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 1481 |
88.9%
|
| 2 | SOME DIFFICULTY | 140 |
8.4%
|
| 3 | A LOT OF DIFFICULTY | 7 |
0.4%
|
| Sysmiss | 38 |
2.3%
|