| Value | Category | Cases | |
|---|---|---|---|
| 1 | every month | 321 |
6.1%
|
| 2 | almost every month | 325 |
6.1%
|
| 3 | some months, but not every month | 1019 |
19.3%
|
| 4 | only in 1 or 2 months | 454 |
8.6%
|
| 5 | never | 3173 |
60%
|
| Sysmiss | 780 |