| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 3 |
0.1%
|
| 1 | Very easy | 99 |
4.1%
|
| 2 | Easy | 320 |
13.3%
|
| 3 | Difficult | 811 |
33.8%
|
| 4 | Very difficult | 710 |
29.6%
|
| 7 | Don't have to pay taxes | 27 |
1.1%
|
| 9 | Don't know | 430 |
17.9%
|
| 998 | Refused | 0 |
0%
|