| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 3903 |
16.4%
|
| 2 | Monthly | 3465 |
14.6%
|
| 3 | Yearly | 2259 |
9.5%
|
| 4 | Not all | 14127 |
59.5%
|
| Sysmiss | 1058 |