| Value | Category | Cases | |
|---|---|---|---|
| 1 | every month | 51 |
0.9%
|
| 2 | almost every month | 217 |
3.7%
|
| 3 | some months, but not every month | 659 |
11.1%
|
| 4 | only in 1 or 2 months | 390 |
6.6%
|
| 5 | never | 4621 |
77.8%
|
| Sysmiss | 381 |