| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1166 |
4.9%
|
| 2 | Monthly | 799 |
3.4%
|
| 3 | Yearly | 1139 |
4.8%
|
| 4 | Not all | 20650 |
86.9%
|
| Sysmiss | 1058 |