| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1978 |
8%
|
| 2 | Monthly | 1361 |
5.5%
|
| 3 | Yearly | 989 |
4%
|
| 4 | Less often | 2323 |
9.4%
|
| 5 | Not at all | 17941 |
73%
|
| Sysmiss | 516 |