| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1615 |
6.6%
|
| 2 | Monthly | 3472 |
14.1%
|
| 3 | Yearly | 4613 |
18.8%
|
| 4 | Less often | 9924 |
40.4%
|
| 5 | Not at all | 4968 |
20.2%
|
| Sysmiss | 516 |