Year Dollars 1997-01-01 3927350 2002-01-01 5228396 2003-01-01 6368319 2004-01-01 7971833 2005-01-01 7610304 2006-01-01 32957728 2007-01-01 21013130 2008-01-01 27338686 2009-01-01 17061690 2010-01-01 17581908 2011-01-01 27156539 2012-01-01 10821211 2013-01-01 20101165 2014-01-01 20751102 2015-01-01 25508153 2016-01-01 10084099