Year	U.S. Dollars
2000-01-01	48948800000
2001-01-01	48484800000
2002-01-01	41992800000
2003-01-01	59672300000
2004-01-01	87771700000
2005-01-01	152980800000
2006-01-01	224888500000
2007-01-01	304908000000
2008-01-01	441280300000
2009-01-01	408091200000
2010-01-01	443155500000
2011-01-01	536229600000
2012-01-01	648709900000
2013-01-01	718440000000
2014-01-01	726849100000
2015-01-01	611892000000
2016-01-01	533556800000
2017-01-01	493819500000
2018-01-01	495002100000
2019-01-01	492092400000