Year Dollars 1992-01-01 4441705 1997-01-01 6262594 2002-01-01 6259800 2003-01-01 8368200 2004-01-01 7059135 2005-01-01 13342767 2006-01-01 14902781 2007-01-01 18918423 2008-01-01 29751619 2009-01-01 25696300 2010-01-01 36578378 2011-01-01 38940572 2012-01-01 39630963 2013-01-01 49122092 2014-01-01 28610236 2015-01-01 27311021 2016-01-01 33190265