| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 1579 |
6.4%
|
| 2 | Monthly | 3015 |
12.2%
|
| 3 | Yearly | 2279 |
9.3%
|
| 4 | Not all | 17753 |
72.1%
|
| Sysmiss | 534 |