| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 0 |
0%
|
| 2 | Monthly | 9 |
13.8%
|
| 3 | Quarterly | 23 |
35.4%
|
| 4 | Annually | 33 |
50.8%
|
| Sysmiss | 12716 |