| Value | Category | Cases | |
|---|---|---|---|
| 1 | Monthly | 7 |
7.8%
|
| 2 | Bi-monthly | 19 |
21.1%
|
| 3 | Quarterly | 62 |
68.9%
|
| 4 | Annually | 2 |
2.2%
|
| Sysmiss | 946 |