| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2771 |
11.1%
|
| 2 | Monthly | 2044 |
8.2%
|
| 3 | Yearly | 1120 |
4.5%
|
| 4 | Not all | 19110 |
76.3%
|
| Sysmiss | 69 |