Year Dollars 1997-01-01 400834 2002-01-01 8689840 2003-01-01 9938822 2004-01-01 6065392 2005-01-01 16647692 2006-01-01 8924985 2007-01-01 11721040 2008-01-01 17412734 2009-01-01 16076469 2010-01-01 15970192 2011-01-01 25131781 2012-01-01 20228139 2013-01-01 13107759 2014-01-01 21865196 2015-01-01 14370496 2016-01-01 26906347