| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 352 |
1.5%
|
| 2 | Monthly | 815 |
3.4%
|
| 3 | Yearly | 2051 |
8.5%
|
| 4 | Not all | 20879 |
86.6%
|
| Sysmiss | 392 |