| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2125 |
8.8%
|
| 2 | Monthly | 2706 |
11.2%
|
| 3 | Yearly | 2089 |
8.7%
|
| 4 | Not all | 17177 |
71.3%
|
| Sysmiss | 392 |