Year Dollars 1997-01-01 532665 2002-01-01 411715 2003-01-01 960058 2004-01-01 1887835 2005-01-01 2553225 2006-01-01 3037681 2007-01-01 2078210 2008-01-01 6220914 2009-01-01 3441702 2010-01-01 6012406 2011-01-01 12341853 2012-01-01 9731214 2013-01-01 15351756 2014-01-01 9567321 2015-01-01 9416157 2016-01-01 8076387