| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2213 |
9%
|
| 2 | Monthly | 1573 |
6.4%
|
| 3 | Yearly | 1507 |
6.1%
|
| 4 | Not all | 19333 |
78.5%
|
| Sysmiss | 534 |