| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 182 |
0.7%
|
| 2 | Monthly | 435 |
1.8%
|
| 3 | Yearly | 883 |
3.6%
|
| 4 | Less often | 2085 |
8.5%
|
| 5 | Not at all | 21007 |
85.4%
|
| Sysmiss | 516 |