| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 546 |
2.2%
|
| 2 | Monthly | 3051 |
12.4%
|
| 3 | Yearly | 2263 |
9.2%
|
| 4 | Not all | 18766 |
76.2%
|
| Sysmiss | 534 |