| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3538 |
14.7%
|
| 2 | Monthly | 2790 |
11.6%
|
| 3 | Yearly | 1990 |
8.3%
|
| 4 | Not all | 15779 |
65.5%
|
| Sysmiss | 392 |