| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 742 |
3.4%
|
| 2 | Weekly | 995 |
4.6%
|
| 3 | Monthly | 1043 |
4.8%
|
| 4 | Yearly | 271 |
1.3%
|
| 5 | Not at all | 18626 |
85.9%
|
| Sysmiss | 3431 |