| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1719 |
7.4%
|
| 2 | Monthly | 1651 |
7.1%
|
| 3 | Yearly | 1774 |
7.6%
|
| 4 | Not all | 18190 |
78%
|
| Sysmiss | 1073 |