| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Once per month or more often | 640 |
18%
|
| 2 | b. Once per every two months | 1048 |
29.6%
|
| 3 | c. Once per every six months or year | 80 |
2.3%
|
| Missing value | 1778 |
50.1%
|