Year Dollars 1992-01-01 7793769 1997-01-01 3708252 2002-01-01 15934676 2003-01-01 21541689 2004-01-01 5427889 2005-01-01 5538113 2006-01-01 6228130 2007-01-01 8730572 2008-01-01 9740066 2009-01-01 15043378 2010-01-01 15583124 2011-01-01 13288654 2012-01-01 29293021 2013-01-01 13209506 2014-01-01 16421566 2015-01-01 8159347 2016-01-01 12466474