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1820 move then 60 million immagrants have came to America from all over the world.
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1830 census showed that udban areas were growing faster then rural areas.
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1920 the nations demograhics began to change.
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1950 industries and people began to move to the colder northern cites to the warmer southern states.
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Housedholds shank in 1970.
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75.1% said they were white or caucatain.
12.3% said they were black or african american.