| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 829 |
3.4%
|
| 2 | Monthly | 1297 |
5.3%
|
| 3 | Yearly | 1582 |
6.4%
|
| 4 | Not all | 20918 |
84.9%
|
| Sysmiss | 534 |