| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 881 |
3.5%
|
| 2 | Monthly | 2593 |
10.4%
|
| 3 | Yearly | 5699 |
22.8%
|
| 4 | Not all | 15872 |
63.4%
|
| Sysmiss | 69 |