| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 111 |
9.3%
|
| 2 | Easy | 291 |
24.3%
|
| 3 | Difficult | 138 |
11.5%
|
| 4 | Very difficult | 110 |
9.2%
|
| 7 | Not applicable | 550 |
45.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 0 |
0%
|