| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1993 |
8.1%
|
| 2 | Monthly | 1451 |
5.9%
|
| 3 | Yearly | 827 |
3.4%
|
| 4 | Less often | 3005 |
12.2%
|
| 5 | Not at all | 17374 |
70.5%
|
| Sysmiss | 510 |