| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very Difficult | 621 |
28.1%
|
| 2 | Difficult | 647 |
29.3%
|
| 3 | Easy | 223 |
10.1%
|
| 4 | Very Easy | 28 |
1.3%
|
| 7 | Never Try | 648 |
29.3%
|
| 9 | Don't know | 43 |
1.9%
|