| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 6 |
0.3%
|
| 1 | Very easy | 147 |
6.1%
|
| 2 | Easy | 385 |
16%
|
| 3 | Difficult | 610 |
25.4%
|
| 4 | Very difficult | 767 |
32%
|
| 7 | Don't have to pay taxes | 43 |
1.8%
|
| 9 | Don't Know | 442 |
18.4%
|
| 98 | Refused | 0 |
0%
|