| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 440 |
1.8%
|
| 2 | Monthly | 1008 |
4.1%
|
| 3 | Yearly | 879 |
3.6%
|
| 4 | Less often | 2123 |
8.6%
|
| 5 | Not at all | 20142 |
81.9%
|
| Sysmiss | 516 |