| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 481 |
2%
|
| 2 | Monthly | 1609 |
6.5%
|
| 3 | Yearly | 2676 |
10.9%
|
| 4 | Not all | 19860 |
80.6%
|
| Sysmiss | 534 |