| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 900 |
3.7%
|
| 2 | Monthly | 3563 |
14.5%
|
| 3 | Yearly | 3106 |
12.6%
|
| 4 | Less often | 4469 |
18.1%
|
| 5 | Not at all | 12612 |
51.2%
|
| Sysmiss | 510 |