| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2001 |
8.1%
|
| 2 | Monthly | 3739 |
15.2%
|
| 3 | Yearly | 5005 |
20.3%
|
| 4 | Not all | 13881 |
56.4%
|
| Sysmiss | 534 |