The document contains information from the U.S. Census Bureau and the Minnesota Population Center about the density of occupied housing units in the New Orleans metro area and in New Orleans for the years 1960, 1970, 1980, 1990, 2000, and 2010. The source is consistently cited as coming from analysis of Census Bureau and Minnesota Population Center data from the National Historical Geographic Information System version 2.0 compiled by the University of Minnesota in 2011.