| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 116 |
0.5%
|
| 2 | Monthly | 228 |
0.9%
|
| 3 | Yearly | 942 |
3.8%
|
| 4 | Less often | 1592 |
6.5%
|
| 5 | Not at all | 21772 |
88.3%
|
| Sysmiss | 510 |