| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2003 |
8.1%
|
| 2 | Monthly | 1964 |
7.9%
|
| 3 | Yearly | 1681 |
6.8%
|
| 4 | Less often | 3397 |
13.7%
|
| 5 | Not at all | 15722 |
63.5%
|
| Sysmiss | 817 |