| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 4 |
0.3%
|
| 2 | Easy | 38 |
3.2%
|
| 3 | Difficult | 21 |
1.8%
|
| 4 | Very Difficult | 17 |
1.4%
|
| 7 | No contact | 1119 |
93.3%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don't know | 1 |
0.1%
|