| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 103 |
8.6%
|
| 2 | Easy | 263 |
21.9%
|
| 3 | Difficult | 133 |
11.1%
|
| 4 | Very difficult | 51 |
4.3%
|
| 7 | Not applicable | 649 |
54.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|