| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1557 |
6.3%
|
| 2 | Monthly | 2452 |
10%
|
| 3 | Yearly | 2289 |
9.3%
|
| 4 | Not all | 18290 |
74.4%
|
| Sysmiss | 582 |