Year Dollars 1997-01-01 103494 2002-01-01 4547824 2004-01-01 7465666 2005-01-01 8431816 2007-01-01 7250909 2008-01-01 13482066 2009-01-01 21208675 2010-01-01 25770949 2011-01-01 11401515 2012-01-01 12723260 2013-01-01 8970113 2014-01-01 10876526 2015-01-01 9248544