| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 447 |
1.8%
|
| 2 | Monthly | 620 |
2.5%
|
| 3 | Yearly | 878 |
3.6%
|
| 4 | Less often | 1763 |
7.2%
|
| 5 | Not at all | 20942 |
85%
|
| Sysmiss | 510 |