The first female self-made millionaire in America was a black woman.
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According to a 2014 study, 1 in 10 Americans think HTML is a sexually-transmitted disease.
8
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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There are six times as many people of Irish descent living in America than in Ireland.
15
There are two credit cards for every person in the United States.
2