| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1976 |
8%
|
| 2 | Monthly | 1036 |
4.2%
|
| 3 | Yearly | 627 |
2.5%
|
| 4 | Less often | 2271 |
9.2%
|
| 5 | Not at all | 18682 |
76%
|
| Sysmiss | 516 |