| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 940 |
3.8%
|
| 2 | Monthly | 4596 |
18.6%
|
| 3 | Yearly | 3278 |
13.3%
|
| 4 | Less often | 5566 |
22.6%
|
| 5 | Not at all | 10270 |
41.7%
|
| Sysmiss | 510 |