| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 108 |
4.5%
|
| 2 | Easy | 208 |
8.7%
|
| 3 | Difficult | 204 |
8.5%
|
| 4 | Very difficult | 131 |
5.5%
|
| 7 | Not applicable | 1746 |
72.8%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 3 |
0.1%
|