| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 35 |
2.9%
|
| 2 | Easy | 165 |
13.8%
|
| 3 | Difficult | 470 |
39.2%
|
| 4 | Very difficult | 446 |
37.2%
|
| 9 | Don't Know | 84 |
7%
|
| 98 | Refused | 0 |
0%
|