| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2772 |
11.1%
|
| 2 | Monthly | 932 |
3.7%
|
| 3 | Yearly | 872 |
3.5%
|
| 4 | Not all | 20469 |
81.7%
|
| Sysmiss | 69 |