| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 529 |
2.1%
|
| 2 | Monthly | 1324 |
5.4%
|
| 3 | Yearly | 1667 |
6.8%
|
| 4 | Not all | 21106 |
85.7%
|
| Sysmiss | 534 |