| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 944 |
3.8%
|
| 2 | Monthly | 1992 |
8.1%
|
| 3 | Yearly | 1886 |
7.7%
|
| 4 | Less often | 3586 |
14.6%
|
| 5 | Not at all | 16184 |
65.8%
|
| Sysmiss | 516 |