| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2763 |
11.2%
|
| 2 | Monthly | 8262 |
33.5%
|
| 3 | Yearly | 5193 |
21.1%
|
| 4 | Not all | 8408 |
34.1%
|
| Sysmiss | 534 |