| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 146 |
0.6%
|
| 2 | Monthly | 211 |
0.9%
|
| 3 | Yearly | 529 |
2.1%
|
| 4 | Less often | 1196 |
4.9%
|
| 5 | Not at all | 22568 |
91.6%
|
| Sysmiss | 510 |