| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 76 |
3.2%
|
| 2 | Easy | 175 |
7.3%
|
| 3 | Difficult | 980 |
40.9%
|
| 4 | Very difficult | 833 |
34.7%
|
| 7 | Don't have to pay taxes | 65 |
2.7%
|
| 9 | Don't know | 270 |
11.3%
|
| 998 | Refused | 0 |
0%
|