| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 366 |
1.6%
|
| 2 | Monthly | 1136 |
4.9%
|
| 3 | Yearly | 2315 |
9.9%
|
| 4 | Not all | 19517 |
83.6%
|
| Sysmiss | 1073 |