| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 8088 |
32.8%
|
| 2 | Monthly | 4578 |
18.6%
|
| 3 | Yearly | 2005 |
8.1%
|
| 4 | Not all | 9955 |
40.4%
|
| Sysmiss | 534 |