| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 604 |
2.4%
|
| 2 | Monthly | 769 |
3.1%
|
| 3 | Yearly | 1112 |
4.5%
|
| 4 | Less often | 2743 |
11.1%
|
| 5 | Not at all | 19539 |
78.9%
|
| Sysmiss | 817 |