Year Dollars 1992-01-01 539439 1997-01-01 1323580 2002-01-01 2036695 2004-01-01 3888050 2005-01-01 2944617 2006-01-01 4362413 2007-01-01 2825153 2008-01-01 5998829 2009-01-01 4170912 2010-01-01 4349239 2011-01-01 7478966 2012-01-01 8476175 2013-01-01 10669642 2014-01-01 5228054 2015-01-01 3034331 2016-01-01 2078096