| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 655 |
2.7%
|
| 2 | Monthly | 1786 |
7.3%
|
| 3 | Yearly | 3746 |
15.2%
|
| 4 | Less often | 6798 |
27.6%
|
| 5 | Not at all | 11607 |
47.2%
|
| Sysmiss | 516 |