| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 338 |
1.4%
|
| 2 | Monthly | 551 |
2.2%
|
| 3 | Yearly | 1142 |
4.6%
|
| 4 | Not all | 22557 |
91.7%
|
| Sysmiss | 582 |