| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 7271 |
30.2%
|
| 2 | Monthly | 4192 |
17.4%
|
| 3 | Yearly | 1691 |
7%
|
| 4 | Not all | 10943 |
45.4%
|
| Sysmiss | 392 |