| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3155 |
12.8%
|
| 2 | Monthly | 2817 |
11.4%
|
| 3 | Yearly | 1409 |
5.7%
|
| 4 | Less often | 3499 |
14.2%
|
| 5 | Not at all | 13770 |
55.9%
|
| Sysmiss | 510 |