| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 711 |
2.9%
|
| 2 | Monthly | 886 |
3.6%
|
| 3 | Yearly | 999 |
4.1%
|
| 4 | Less often | 1886 |
7.7%
|
| 5 | Not at all | 20168 |
81.8%
|
| Sysmiss | 510 |