| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1374 |
5.8%
|
| 2 | Monthly | 2653 |
11.2%
|
| 3 | Yearly | 2501 |
10.5%
|
| 4 | Not all | 17226 |
72.5%
|
| Sysmiss | 1058 |