Year Dollars 1992-01-01 7852938 1997-01-01 13783866 2002-01-01 14963813 2003-01-01 15783880 2004-01-01 14024045 2005-01-01 15250062 2006-01-01 18824134 2007-01-01 33454713 2008-01-01 45180715 2009-01-01 22978757 2010-01-01 31576560 2011-01-01 49244636 2012-01-01 36214909 2013-01-01 23182414 2014-01-01 20366877 2015-01-01 10238437 2016-01-01 11245681