| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 510 |
2.1%
|
| 2 | Monthly | 2217 |
9%
|
| 3 | Yearly | 1487 |
6%
|
| 4 | Less often | 2291 |
9.3%
|
| 5 | Not at all | 18087 |
73.5%
|
| Sysmiss | 516 |