Year Dollars 1997-01-01 894314 2002-01-01 316661 2003-01-01 735654 2004-01-01 991957 2005-01-01 1307108 2006-01-01 2309764 2007-01-01 6083186 2008-01-01 5848361 2009-01-01 3600459 2010-01-01 3984865 2011-01-01 6329696 2012-01-01 7389080 2013-01-01 8820352 2014-01-01 7488846 2015-01-01 9589897