| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2537 |
10.3%
|
| 2 | Monthly | 4652 |
18.9%
|
| 3 | Yearly | 1594 |
6.5%
|
| 4 | Less often | 2998 |
12.2%
|
| 5 | Not at all | 12869 |
52.2%
|
| Sysmiss | 510 |