| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 34 |
2.8%
|
| 2 | Easy | 96 |
8%
|
| 3 | Difficult | 327 |
27.3%
|
| 4 | Very difficult | 519 |
43.3%
|
| 7 | Don't have to pay taxes | 133 |
11.1%
|
| 9 | Don't know | 91 |
7.6%
|
| 998 | Refused | 0 |
0%
|