Some health experts recommend that women take 400 micrograms of the vitamin
folic acid, for which of the following reasons?
(among female respondents aged 18-44)

Response Number of Respondents at Risk (n) Weighted Percent
To make strong bones 147 15.6
To prevent birth defects 387 40.5
To prevent high blood pressure 33 3.2
Some other reason 114 12.3
Don't know/Not sure 277 28.4