| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 173 |
0.7%
|
| 2 | Monthly | 859 |
3.5%
|
| 3 | Yearly | 3475 |
14.1%
|
| 4 | Not all | 20081 |
81.7%
|
| Sysmiss | 582 |