| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3744 |
15.1%
|
| 2 | Monthly | 648 |
2.6%
|
| 3 | Yearly | 775 |
3.1%
|
| 4 | Less often | 1653 |
6.7%
|
| 5 | Not at all | 17947 |
72.5%
|
| Sysmiss | 817 |