| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 1 |
0%
|
| 1 | Very easy | 23 |
1%
|
| 2 | Easy | 144 |
6%
|
| 3 | Difficult | 866 |
36.1%
|
| 4 | Very difficult | 940 |
39.2%
|
| 7 | Don't have to pay taxes | 144 |
6%
|
| 9 | Don't know | 282 |
11.8%
|
| 998 | Refused | 0 |
0%
|