| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 83 |
6.9%
|
| 2 | Easy | 190 |
15.8%
|
| 3 | Difficult | 21 |
1.8%
|
| 4 | Very Difficult | 2 |
0.2%
|
| 7 | No contact | 903 |
75.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|