| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 4115 |
16.7%
|
| 2 | Monthly | 870 |
3.5%
|
| 3 | Yearly | 902 |
3.7%
|
| 4 | Not all | 18701 |
76.1%
|
| Sysmiss | 582 |