| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 964 |
4.1%
|
| 2 | Monthly | 3675 |
15.5%
|
| 3 | Yearly | 875 |
3.7%
|
| 4 | Not all | 18240 |
76.8%
|
| Sysmiss | 1058 |