| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 631 |
2.7%
|
| 2 | Monthly | 1952 |
8.2%
|
| 3 | Yearly | 843 |
3.5%
|
| 4 | Not all | 20328 |
85.6%
|
| Sysmiss | 1058 |