| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1985 |
8.5%
|
| 2 | Monthly | 2634 |
11.3%
|
| 3 | Yearly | 1470 |
6.3%
|
| 4 | Not all | 17245 |
73.9%
|
| Sysmiss | 1073 |