| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 128 |
10.7%
|
| 2 | Easy | 256 |
21.3%
|
| 3 | Difficult | 211 |
17.6%
|
| 4 | Very difficult | 260 |
21.7%
|
| 7 | Not applicable | 344 |
28.7%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|