| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 712 |
2.9%
|
| 2 | Monthly | 2474 |
10%
|
| 3 | Yearly | 2609 |
10.5%
|
| 4 | Less often | 4426 |
17.9%
|
| 5 | Not at all | 14546 |
58.7%
|
| Sysmiss | 817 |