Year Dollars 1992-01-01 22267679 1997-01-01 30964245 2002-01-01 27388267 2003-01-01 32546329 2004-01-01 31599924 2005-01-01 35765280 2006-01-01 37576949 2007-01-01 48063613 2008-01-01 49426011 2009-01-01 44039953 2010-01-01 44990931 2011-01-01 48801746 2012-01-01 48245757 2013-01-01 47496841 2014-01-01 51234568 2015-01-01 52078064 2016-01-01 45219461