| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2466 |
10%
|
| 2 | Monthly | 889 |
3.6%
|
| 3 | Yearly | 1093 |
4.4%
|
| 4 | Not all | 20140 |
81.9%
|
| Sysmiss | 582 |