| Value | Category | Cases | |
|---|---|---|---|
| 1 | do_not_know | 10 |
1.2%
|
| 2 | per_month | 112 |
13.7%
|
| 3 | prefer_not_to_answer | 3 |
0.4%
|
| Missing value | 690 |
84.7%
|