| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2677 |
11.5%
|
| 2 | Monthly | 8099 |
34.7%
|
| 3 | Yearly | 5286 |
22.7%
|
| 4 | Not all | 7272 |
31.2%
|
| Sysmiss | 1073 |