| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1317 |
5.4%
|
| 2 | Monthly | 1246 |
5.1%
|
| 3 | Yearly | 1062 |
4.3%
|
| 4 | Not all | 20963 |
85.3%
|
| Sysmiss | 582 |