| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 647 |
2.6%
|
| 2 | Monthly | 1222 |
5%
|
| 3 | Yearly | 1829 |
7.4%
|
| 4 | Not all | 20890 |
85%
|
| Sysmiss | 582 |