Year Dollars 1992-01-01 6167392 2002-01-01 7375653 2003-01-01 4881066 2004-01-01 6494570 2005-01-01 6939407 2006-01-01 6580676 2007-01-01 11431132 2008-01-01 17049684 2009-01-01 15937932 2010-01-01 20628307 2011-01-01 47627036 2012-01-01 52989782 2013-01-01 66296420 2014-01-01 55765004 2015-01-01 98255761 2016-01-01 61813810