| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2742 |
11.1%
|
| 2 | Monthly | 3679 |
14.9%
|
| 3 | Yearly | 2383 |
9.7%
|
| 4 | Not all | 15822 |
64.2%
|
| Sysmiss | 534 |