| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 343 |
1.4%
|
| 2 | Monthly | 1840 |
7.5%
|
| 3 | Yearly | 3475 |
14.1%
|
| 4 | Less often | 5066 |
20.6%
|
| 5 | Not at all | 13926 |
56.5%
|
| Sysmiss | 510 |