National Index Constructionhttp://www.fhfa.gov/Default.aspx?Page=87Mon, 11 May 2009 13:48:19 GMT720Census Division Weights Used in National Index Constructionhttp://www.fhfa.gov/webfiles/1147/weights.xlsCensus Division Weights Used in National Index ConstructionWed, 18 Feb 2009 00:00:00 GMT837