Year Dollars 1992-01-01 196036123 1997-01-01 802961484 2002-01-01 619671615 2003-01-01 704440815 2004-01-01 676518630 2005-01-01 823301588 2006-01-01 872355872 2007-01-01 741660175 2008-01-01 937411423 2009-01-01 660484744 2010-01-01 994155403 2011-01-01 1590664113 2012-01-01 1937270572 2013-01-01 2164850762 2014-01-01 2280316785 2015-01-01 2836965468 2016-01-01 2548583016