| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2306 |
9.2%
|
| 2 | Monthly | 2781 |
11.1%
|
| 3 | Yearly | 2298 |
9.2%
|
| 4 | Not all | 17660 |
70.5%
|
| Sysmiss | 69 |