| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2304 |
9.4%
|
| 2 | Monthly | 1825 |
7.4%
|
| 3 | Yearly | 1464 |
6%
|
| 4 | Not all | 18995 |
77.3%
|
| Sysmiss | 582 |