| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 27 |
1.1%
|
| 2 | Easy | 159 |
6.6%
|
| 3 | Difficult | 740 |
30.8%
|
| 4 | Very difficult | 1097 |
45.7%
|
| 7 | Don't have to pay taxes | 90 |
3.8%
|
| 9 | Don't Know | 287 |
12%
|
| 98 | Refused | 0 |
0%
|