| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 293 |
1.2%
|
| 2 | Monthly | 1316 |
5.5%
|
| 3 | Yearly | 3490 |
14.7%
|
| 4 | Not all | 18655 |
78.5%
|
| Sysmiss | 1058 |