| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 197 |
8.2%
|
| 2 | Easy | 479 |
20%
|
| 3 | Difficult | 333 |
13.9%
|
| 4 | Very difficult | 123 |
5.1%
|
| 7 | Not applicable | 1267 |
52.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0%
|