| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2855 |
11.6%
|
| 2 | Monthly | 3643 |
14.8%
|
| 3 | Yearly | 2191 |
8.9%
|
| 4 | Not all | 15937 |
64.7%
|
| Sysmiss | 534 |