| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2523 |
10.8%
|
| 2 | Monthly | 1772 |
7.6%
|
| 3 | Yearly | 916 |
3.9%
|
| 4 | Not all | 18123 |
77.7%
|
| Sysmiss | 1073 |