| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 124 |
0.5%
|
| 2 | Monthly | 568 |
2.4%
|
| 3 | Yearly | 1975 |
8.5%
|
| 4 | Not all | 20667 |
88.6%
|
| Sysmiss | 1073 |