Year Dollars 1992-01-01 8668004 1997-01-01 42951040 2002-01-01 20088463 2003-01-01 20525740 2004-01-01 29706387 2005-01-01 33141918 2006-01-01 36483871 2007-01-01 42500343 2008-01-01 42458323 2009-01-01 48290261 2010-01-01 45337519 2011-01-01 37333542 2012-01-01 46671171 2013-01-01 42070138 2014-01-01 42396356 2015-01-01 40665594 2016-01-01 50803221