| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2828 |
11.9%
|
| 2 | Monthly | 1892 |
8%
|
| 3 | Yearly | 987 |
4.2%
|
| 4 | Not all | 18047 |
76%
|
| Sysmiss | 1058 |