| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2197 |
8.9%
|
| 2 | Monthly | 8695 |
35.3%
|
| 3 | Yearly | 6862 |
27.9%
|
| 4 | Not all | 6872 |
27.9%
|
| Sysmiss | 534 |