| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2512 |
10.1%
|
| 2 | Monthly | 2358 |
9.5%
|
| 3 | Yearly | 1267 |
5.1%
|
| 4 | Less often | 3615 |
14.6%
|
| 5 | Not at all | 15015 |
60.6%
|
| Sysmiss | 817 |