| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 48 |
4%
|
| 2 | Easy | 271 |
22.6%
|
| 3 | Difficult | 155 |
12.9%
|
| 4 | Very Difficult | 10 |
0.8%
|
| 7 | Not applicable | 714 |
59.5%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don't know | 1 |
0.1%
|