| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 668 |
2.7%
|
| 2 | Monthly | 2611 |
10.4%
|
| 3 | Yearly | 12834 |
51.2%
|
| 4 | Not all | 8932 |
35.7%
|
| Sysmiss | 69 |