| Value | Category | Cases | |
|---|---|---|---|
| 1 | a. Once per month or more often | 11001 |
45.9%
|
| 2 | b. Once per every two months | 167 |
0.7%
|
| 3 | c. Once per every six months or year | 34 |
0.1%
|
| Missing value | 12752 |
53.2%
|