| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1079 |
4.6%
|
| 2 | Monthly | 818 |
3.5%
|
| 3 | Yearly | 1358 |
5.8%
|
| 4 | Not all | 20079 |
86.1%
|
| Sysmiss | 1073 |