| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 607 |
2.5%
|
| 2 | Monthly | 2284 |
9.3%
|
| 3 | Yearly | 1322 |
5.4%
|
| 4 | Less often | 2097 |
8.5%
|
| 5 | Not at all | 18340 |
74.4%
|
| Sysmiss | 510 |