Year Dollars 1992-01-01 51482693 1997-01-01 153022794 2002-01-01 103159748 2003-01-01 127884126 2004-01-01 160751717 2005-01-01 211838056 2006-01-01 252447503 2007-01-01 311164097 2008-01-01 388305165 2009-01-01 357603287 2010-01-01 529507911 2011-01-01 534431476 2012-01-01 508525561 2013-01-01 359376648 2014-01-01 368132547 2015-01-01 412937142 2016-01-01 380931285