| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 442 |
1.8%
|
| 2 | Monthly | 2500 |
10.1%
|
| 3 | Yearly | 1415 |
5.7%
|
| 4 | Less often | 2838 |
11.5%
|
| 5 | Not at all | 17572 |
70.9%
|
| Sysmiss | 817 |