| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1246 |
5.2%
|
| 2 | Monthly | 2449 |
10.3%
|
| 3 | Yearly | 1756 |
7.4%
|
| 4 | Not all | 18303 |
77.1%
|
| Sysmiss | 1058 |