| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2372 |
10%
|
| 2 | Monthly | 1291 |
5.4%
|
| 3 | Yearly | 1451 |
6.1%
|
| 4 | Not all | 18640 |
78.5%
|
| Sysmiss | 1058 |