| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2815 |
12.1%
|
| 2 | Monthly | 2509 |
10.8%
|
| 3 | Yearly | 2298 |
9.8%
|
| 4 | Not all | 15712 |
67.3%
|
| Sysmiss | 1073 |