| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2055 |
8.3%
|
| 2 | Monthly | 7330 |
29.7%
|
| 3 | Yearly | 3718 |
15.1%
|
| 4 | Less often | 5654 |
22.9%
|
| 5 | Not at all | 5893 |
23.9%
|
| Sysmiss | 510 |