| Value | Category | Cases | |
|---|---|---|---|
| 10 | Almost every month | 1656 |
0.7%
|
| 20 | Some months, but not every month | 2156 |
0.9%
|
| 30 | Only one or two months | 309 |
0.1%
|
| 40 | _Refused | 12 |
0%
|
| 50 | _Don't know | 22 |
0%
|
| 60 | _Not applicable | 245017 |
98.3%
|