Year Dollars 1992-01-01 24359954 1997-01-01 48683565 2002-01-01 123361371 2003-01-01 182255792 2004-01-01 194485576 2005-01-01 247407815 2006-01-01 176682517 2007-01-01 140172728 2008-01-01 139262199 2009-01-01 104252391 2010-01-01 186266921 2011-01-01 194344699 2012-01-01 162483561 2013-01-01 299402539 2014-01-01 217072522 2015-01-01 137238130 2016-01-01 128860552