| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1575 |
6.4%
|
| 2 | Monthly | 2466 |
10%
|
| 3 | Yearly | 2424 |
9.8%
|
| 4 | Not all | 18161 |
73.7%
|
| Sysmiss | 534 |