| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3049 |
13.1%
|
| 2 | Monthly | 1515 |
6.5%
|
| 3 | Yearly | 916 |
3.9%
|
| 4 | Not all | 17854 |
76.5%
|
| Sysmiss | 1073 |