| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1277 |
5.3%
|
| 2 | Monthly | 1560 |
6.5%
|
| 3 | Yearly | 1338 |
5.6%
|
| 4 | Not all | 19922 |
82.7%
|
| Sysmiss | 392 |