| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2354 |
9.5%
|
| 2 | Monthly | 857 |
3.5%
|
| 3 | Yearly | 766 |
3.1%
|
| 4 | Less often | 1588 |
6.4%
|
| 5 | Not at all | 19085 |
77.4%
|
| Sysmiss | 510 |