| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3517 |
14%
|
| 2 | Monthly | 1773 |
7.1%
|
| 3 | Yearly | 1076 |
4.3%
|
| 4 | Not all | 18679 |
74.6%
|
| Sysmiss | 69 |