| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1692 |
6.8%
|
| 2 | Monthly | 7688 |
30.7%
|
| 3 | Yearly | 3690 |
14.7%
|
| 4 | Not all | 11975 |
47.8%
|
| Sysmiss | 69 |