| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2058 |
8.7%
|
| 2 | Monthly | 6428 |
27.1%
|
| 3 | Yearly | 967 |
4.1%
|
| 4 | Not all | 14301 |
60.2%
|
| Sysmiss | 1058 |