Year Dollars 1992-01-01 284539364 1997-01-01 299783040 2002-01-01 284070997 2003-01-01 295596528 2004-01-01 335244560 2005-01-01 348690274 2006-01-01 424397680 2007-01-01 530132873 2008-01-01 334276682 2009-01-01 250137360 2010-01-01 371453981 2011-01-01 528736754 2012-01-01 488354773 2013-01-01 363541337 2014-01-01 341047280 2015-01-01 325494824 2016-01-01 327861485