| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 410 |
1.7%
|
| 2 | Monthly | 2295 |
9.7%
|
| 3 | Yearly | 1130 |
4.8%
|
| 4 | Not all | 19919 |
83.9%
|
| Sysmiss | 1058 |