| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3241 |
13.4%
|
| 2 | Monthly | 2727 |
11.3%
|
| 3 | Yearly | 2510 |
10.4%
|
| 4 | Not all | 15619 |
64.8%
|
| Sysmiss | 392 |