| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 320 |
1.3%
|
| 2 | Monthly | 516 |
2.1%
|
| 3 | Yearly | 802 |
3.3%
|
| 4 | Less often | 1447 |
5.9%
|
| 5 | Not at all | 21565 |
87.5%
|
| Sysmiss | 510 |