| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 578 |
2.3%
|
| 2 | Monthly | 1136 |
4.6%
|
| 3 | Yearly | 2002 |
8.1%
|
| 4 | Not all | 20910 |
84.9%
|
| Sysmiss | 534 |