| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3015 |
12.7%
|
| 2 | Monthly | 1649 |
6.9%
|
| 3 | Yearly | 1041 |
4.4%
|
| 4 | Not all | 18049 |
76%
|
| Sysmiss | 1058 |