Year Dollars 1997-01-01 483519 2002-01-01 2239022 2003-01-01 973411 2004-01-01 3173313 2005-01-01 1519424 2006-01-01 1725078 2007-01-01 8316817 2008-01-01 6217413 2009-01-01 2201932 2010-01-01 3392303 2011-01-01 5079993 2012-01-01 8504996 2013-01-01 6825730 2014-01-01 7814802 2015-01-01 6089293 2016-01-01 6749587