Year Dollars 1992-01-01 662176 1997-01-01 1544347 2002-01-01 800676 2003-01-01 1810348 2004-01-01 1734939 2005-01-01 3364144 2006-01-01 4587133 2007-01-01 3185047 2008-01-01 6521253 2009-01-01 3420261 2010-01-01 4544116 2011-01-01 4836960 2012-01-01 4825427 2013-01-01 5129674 2014-01-01 4674503 2015-01-01 4661969 2016-01-01 4233996