Year Dollars 1997-01-01 4818613 2002-01-01 1452690 2003-01-01 2787291 2004-01-01 3856632 2005-01-01 3401699 2006-01-01 4124313 2007-01-01 4825017 2008-01-01 9023006 2009-01-01 2687798 2010-01-01 4055464 2011-01-01 6104579 2012-01-01 10200821 2013-01-01 6961852 2014-01-01 8438467 2015-01-01 7279383 2016-01-01 6445840