| Value | Category | Cases | |
|---|---|---|---|
| 10 | Almost every month | 1854 |
0.7%
|
| 20 | Some months, but not every month | 2658 |
1.1%
|
| 30 | Only one or two months | 390 |
0.2%
|
| 40 | _Refused | 15 |
0%
|
| 50 | _Don't know | 24 |
0%
|
| 60 | _Not applicable | 244231 |
98%
|