| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1868 |
7.5%
|
| 2 | Monthly | 1290 |
5.2%
|
| 3 | Yearly | 717 |
2.9%
|
| 4 | Less often | 2796 |
11.3%
|
| 5 | Not at all | 18096 |
73.1%
|
| Sysmiss | 817 |