U.S. Department of Health and Human Services, Health Resources and Services Administration

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U.S. Population

In 2008, the U.S. population was more than 304 million, with females comprising 50.7 percent of that total. Females younger than 35 years of age accounted for 45.6 percent of the female population, those aged 35–64 years accounted for 39.7 percent, and females aged 65 years and older accounted for 14.5 percent.

The distribution of the population by sex was fairly even across younger age groups; however, women accounted for a greater percentage of the older population than men. Of those aged 65 and older, 57.7 percent were women.

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