| Value | Category | Cases | |
|---|---|---|---|
| 1 | Quarterly | 13 |
17.1%
|
| 2 | Once a month | 45 |
59.2%
|
| 3 | Annually | 10 |
13.2%
|
| 4 | Others | 8 |
10.5%
|
| Sysmiss | 37699 |