Year Dollars 1992-01-01 162739107 1997-01-01 264702950 2002-01-01 237097349 2003-01-01 266553393 2004-01-01 289565617 2005-01-01 305787086 2006-01-01 470274819 2007-01-01 615227313 2008-01-01 763341664 2009-01-01 499412285 2010-01-01 597474672 2011-01-01 826857161 2012-01-01 749306808 2013-01-01 737938054 2014-01-01 741889846 2015-01-01 603911755