| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 2985 |
12.6%
|
| 2 | Monthly | 2917 |
12.3%
|
| 3 | Yearly | 1689 |
7.1%
|
| 4 | Not all | 16163 |
68%
|
| Sysmiss | 1058 |