| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Very easy | 36 |
3%
|
| 2 | Easy | 33 |
2.8%
|
| 3 | Difficult | 355 |
29.6%
|
| 4 | Very difficult | 649 |
54.1%
|
| 7 | Don't have to pay taxes | 45 |
3.8%
|
| 9 | Don't know | 82 |
6.8%
|
| 998 | Refused | 0 |
0%
|