| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2447 |
10.5%
|
| 2 | Monthly | 2581 |
11.1%
|
| 3 | Yearly | 1408 |
6%
|
| 4 | Not all | 16898 |
72.4%
|
| Sysmiss | 1073 |