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Because the Census Bureau is continually adjusting its data collection programs and products, as well as its geographic tabulation areas, historical comparison is a complicated issue. Census Reporter was not able to design a satisfying historical data interface in the scope of our initial grant. We recommend people consult the National Historical Geographic Information System (NHGIS) for historical data comparisons.
You can also find data for many years worth of Census products via data.census.gov, although these do not address the potential complexity of comparing across changes in geography, question details, or other changes in Census programs from year to year.
