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block numbering areaPrior to Census 2000, statistical subdivisions within nonmetropolitan counties for grouping and numbering. BNAs were discontinued for Census 2000, when they were replaced by census tracts.
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block numbering areaPrior to Census 2000, a statistical subdivision of a county or statistically equivalent entity, delineated by a state government agency or Census Bureau regional census center for the purpose of group [..]
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