Year Dollars 1992-01-01 495449215 1997-01-01 698358269 2002-01-01 691647631 2003-01-01 597744071 2004-01-01 706355000 2005-01-01 746101658 2006-01-01 784791460 2007-01-01 712155701 2008-01-01 833120553 2009-01-01 790084164 2010-01-01 1154216482 2011-01-01 1234729301 2012-01-01 1664777069 2013-01-01 1735376089 2014-01-01 1561960452 2015-01-01 1665361696 2016-01-01 1637785333