| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1402 |
5.7%
|
| 2 | Monthly | 2057 |
8.4%
|
| 3 | Yearly | 1749 |
7.1%
|
| 4 | Not all | 19380 |
78.8%
|
| Sysmiss | 582 |