| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 23 |
1.9%
|
| 2 | Easy | 197 |
16.4%
|
| 3 | Difficult | 223 |
18.6%
|
| 4 | Very Difficult | 42 |
3.5%
|
| 7 | Not applicable | 709 |
59.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 6 |
0.5%
|