| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1668 |
6.8%
|
| 2 | Monthly | 5870 |
23.8%
|
| 3 | Yearly | 2358 |
9.6%
|
| 4 | Not all | 14730 |
59.8%
|
| Sysmiss | 534 |