| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 501 |
2.1%
|
| 2 | Monthly | 643 |
2.8%
|
| 3 | Yearly | 480 |
2.1%
|
| 4 | Not all | 21710 |
93%
|
| Sysmiss | 1073 |