Year	U.S. Dollars
2000-01-01	11370700000
2001-01-01	12404100000
2002-01-01	13954700000
2003-01-01	16496700000
2004-01-01	19898200000
2005-01-01	23770800000
2006-01-01	26880800000
2007-01-01	32473700000
2008-01-01	38212500000
2009-01-01	32277800000
2010-01-01	35350900000
2011-01-01	41602800000
2012-01-01	45344200000
2013-01-01	46583400000
2014-01-01	51297200000
2015-01-01	52546900000
2016-01-01	53068100000
2017-01-01	55458300000
2018-01-01	58073200000
2019-01-01	60266300000