| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 564 |
2.3%
|
| 2 | Monthly | 1096 |
4.4%
|
| 3 | Yearly | 1021 |
4.1%
|
| 4 | Less often | 2683 |
10.8%
|
| 5 | Not at all | 19403 |
78.3%
|
| Sysmiss | 817 |