| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 466 |
1.9%
|
| 2 | Monthly | 1216 |
4.9%
|
| 3 | Yearly | 1686 |
6.8%
|
| 4 | Less often | 2614 |
10.6%
|
| 5 | Not at all | 18668 |
75.7%
|
| Sysmiss | 510 |