| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Once per month or more often | 1774 |
50%
|
| 2 | b. Once per every two months | 50 |
1.4%
|
| 3 | c. Once per every six months or year | 6 |
0.2%
|
| Missing value | 1716 |
48.4%
|