Year	U.S. Dollars
2000-01-01	6240700000
2001-01-01	6600600000
2002-01-01	7694400000
2003-01-01	8742400000
2004-01-01	10461000000
2005-01-01	11252300000
2006-01-01	13710800000
2007-01-01	16000300000
2008-01-01	22948400000
2009-01-01	23072600000
2010-01-01	20337500000
2011-01-01	23932600000
2012-01-01	20625200000
2013-01-01	20890100000
2014-01-01	19262600000
2015-01-01	19730900000
2016-01-01	18841900000
2017-01-01	19333500000
2018-01-01	20495500000
2019-01-01	21553400000