| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very Easy | 93 |
3.9%
|
| 2 | Easy | 756 |
31.5%
|
| 3 | Difficult | 734 |
30.6%
|
| 4 | Very Difficult | 325 |
13.5%
|
| 9 | Don’t know | 491 |
20.5%
|