| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 150 |
12.5%
|
| 2 | Easy | 302 |
25.2%
|
| 3 | Difficult | 139 |
11.6%
|
| 4 | Very Difficult | 103 |
8.6%
|
| 7 | No contact | 505 |
42.1%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|