| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2648 |
11%
|
| 2 | Monthly | 932 |
3.9%
|
| 3 | Yearly | 815 |
3.4%
|
| 4 | Not all | 19702 |
81.8%
|
| Sysmiss | 392 |