| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 805 |
3.3%
|
| 2 | Monthly | 1790 |
7.3%
|
| 3 | Yearly | 1213 |
4.9%
|
| 4 | Less often | 2552 |
10.4%
|
| 5 | Not at all | 18232 |
74.1%
|
| Sysmiss | 516 |