| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2131 |
8.6%
|
| 2 | Monthly | 771 |
3.1%
|
| 3 | Yearly | 700 |
2.8%
|
| 4 | Less often | 1637 |
6.6%
|
| 5 | Not at all | 19528 |
78.8%
|
| Sysmiss | 817 |