| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 4513 |
18.7%
|
| 2 | Monthly | 2202 |
9.1%
|
| 3 | Yearly | 880 |
3.7%
|
| 4 | Not all | 16502 |
68.5%
|
| Sysmiss | 392 |