| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 294 |
1.2%
|
| 2 | Monthly | 1697 |
6.9%
|
| 3 | Yearly | 3580 |
14.6%
|
| 4 | Less often | 4901 |
19.9%
|
| 5 | Not at all | 14120 |
57.4%
|
| Sysmiss | 516 |