| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2077 |
8.7%
|
| 2 | Monthly | 5175 |
21.8%
|
| 3 | Yearly | 910 |
3.8%
|
| 4 | Not all | 15592 |
65.6%
|
| Sysmiss | 1058 |