| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 26 |
2.2%
|
| 2 | Easy | 170 |
14.2%
|
| 3 | Difficult | 437 |
36.4%
|
| 4 | Very difficult | 313 |
26.1%
|
| 7 | Don't have to pay taxes | 42 |
3.5%
|
| 9 | Don't know | 212 |
17.7%
|
| 998 | Refused | 0 |
0%
|