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It had 256 people in the world
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It had 384 people
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BLACK DEATH thousand of people died
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Population grew to 516 million of people
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781 million people
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there were 890 million of people
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It was over 1,2 bilion people
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doubled the population (2,5 bilion)
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grew to 6 bilion of people
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7,2 bilion