| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 749 |
3.2%
|
| 2 | Monthly | 1295 |
5.5%
|
| 3 | Yearly | 898 |
3.8%
|
| 4 | Not all | 20392 |
87.4%
|
| Sysmiss | 1073 |