| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2606 |
10.6%
|
| 2 | Monthly | 2796 |
11.4%
|
| 3 | Yearly | 2588 |
10.5%
|
| 4 | Not all | 16598 |
67.5%
|
| Sysmiss | 582 |