| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2033 |
8.1%
|
| 2 | Monthly | 2792 |
11.1%
|
| 3 | Yearly | 1709 |
6.8%
|
| 4 | Not all | 18511 |
73.9%
|
| Sysmiss | 69 |