| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1677 |
6.8%
|
| 2 | Monthly | 6498 |
26.2%
|
| 3 | Yearly | 3748 |
15.1%
|
| 4 | Less often | 6118 |
24.7%
|
| 5 | Not at all | 6726 |
27.2%
|
| Sysmiss | 817 |