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Infant mortality rates in the United States by decade (1920-2010)
A data frame with 10 observations on the following 2 variables.
Mortality
Deaths within one year of birth (per 1000 births)
Year
Year (1920-2010 by decades)
Infant mortality (deaths within one year of birth per 1,000 births) in the US from 1920 - 2010 (by decade).