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According to the US Census Bureau, the population of the USA in 2006 was 299, 398, 484. Of that population figure, 24.6% were under the age of 18. Therefore, the population of the USA over the age of 18 is: 225,746,457

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-Steve Reid

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โˆ™ 2008-10-01 14:29:03
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Q: How many Americans are over the age of 18?
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