| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2459 |
10%
|
| 2 | Monthly | 4578 |
18.6%
|
| 3 | Yearly | 1669 |
6.8%
|
| 4 | Less often | 3148 |
12.8%
|
| 5 | Not at all | 12738 |
51.8%
|
| Sysmiss | 516 |