| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 97 |
8.1%
|
| 2 | Easy | 208 |
17.3%
|
| 3 | Difficult | 80 |
6.7%
|
| 4 | Very difficult | 31 |
2.6%
|
| 7 | Not applicable | 783 |
65.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|