Year Dollars 1997-01-01 5131988 2002-01-01 1183020 2003-01-01 2807132 2004-01-01 1710930 2005-01-01 1577653 2006-01-01 918723 2007-01-01 5559351 2008-01-01 5682343 2009-01-01 3626743 2010-01-01 2540831 2011-01-01 2835177 2012-01-01 5273390 2013-01-01 3158916 2014-01-01 4211976 2015-01-01 5734152 2016-01-01 4482505