| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 447 |
1.8%
|
| 2 | Monthly | 698 |
2.8%
|
| 3 | Yearly | 1166 |
4.7%
|
| 4 | Not all | 22277 |
90.6%
|
| Sysmiss | 582 |