Year Dollars 1997-01-01 2489340 2002-01-01 9359107 2003-01-01 12329079 2004-01-01 24533649 2005-01-01 33880385 2006-01-01 43886139 2007-01-01 63297166 2008-01-01 96877885 2009-01-01 73323332 2010-01-01 105500392 2011-01-01 116620153 2012-01-01 134470759 2013-01-01 169473620 2014-01-01 180789959 2015-01-01 166310828 2016-01-01 187663492