| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 776 |
3.1%
|
| 2 | Monthly | 739 |
3%
|
| 3 | Yearly | 971 |
3.9%
|
| 4 | Less often | 1871 |
7.6%
|
| 5 | Not at all | 20293 |
82.3%
|
| Sysmiss | 510 |