| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 461 |
1.9%
|
| 2 | Monthly | 625 |
2.5%
|
| 3 | Yearly | 2590 |
10.5%
|
| 4 | Less often | 4100 |
16.6%
|
| 5 | Not at all | 16991 |
68.6%
|
| Sysmiss | 817 |