| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 861 |
3.5%
|
| 2 | Monthly | 4468 |
18.2%
|
| 3 | Yearly | 3148 |
12.8%
|
| 4 | Less often | 5717 |
23.2%
|
| 5 | Not at all | 10398 |
42.3%
|
| Sysmiss | 516 |