| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 8036 |
32.7%
|
| 2 | Monthly | 4389 |
17.9%
|
| 3 | Yearly | 1920 |
7.8%
|
| 4 | Not all | 10243 |
41.7%
|
| Sysmiss | 582 |