| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3978 |
16.2%
|
| 2 | Monthly | 3682 |
15%
|
| 3 | Yearly | 2091 |
8.5%
|
| 4 | Not all | 14837 |
60.3%
|
| Sysmiss | 582 |