| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3749 |
15.2%
|
| 2 | Monthly | 2495 |
10.1%
|
| 3 | Yearly | 1529 |
6.2%
|
| 4 | Not all | 16815 |
68.4%
|
| Sysmiss | 582 |