| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 631 |
2.7%
|
| 2 | Monthly | 1850 |
7.9%
|
| 3 | Yearly | 2859 |
12.3%
|
| 4 | Not all | 17994 |
77.1%
|
| Sysmiss | 1073 |