| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1397 |
5.8%
|
| 2 | Monthly | 2714 |
11.3%
|
| 3 | Yearly | 2708 |
11.2%
|
| 4 | Not all | 17278 |
71.7%
|
| Sysmiss | 392 |