| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 324 |
1.3%
|
| 2 | Monthly | 505 |
2.1%
|
| 3 | Yearly | 815 |
3.3%
|
| 4 | Less often | 1572 |
6.4%
|
| 5 | Not at all | 21376 |
86.9%
|
| Sysmiss | 516 |