| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 4463 |
18.8%
|
| 2 | Monthly | 1171 |
4.9%
|
| 3 | Yearly | 634 |
2.7%
|
| 4 | Not all | 17486 |
73.6%
|
| Sysmiss | 1058 |