| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2742 |
11.2%
|
| 2 | Monthly | 3577 |
14.5%
|
| 3 | Yearly | 2278 |
9.3%
|
| 4 | Not all | 15991 |
65%
|
| Sysmiss | 582 |