Year	U.S. Dollars
2000-01-01	51704700000
2001-01-01	50787100000
2002-01-01	54362700000
2003-01-01	69538300000
2004-01-01	93967900000
2005-01-01	122070000000
2006-01-01	152433800000
2007-01-01	186690700000
2008-01-01	248808200000
2009-01-01	201958900000
2010-01-01	238328200000
2011-01-01	315868500000
2012-01-01	375479400000
2013-01-01	392273400000
2014-01-01	401382000000
2015-01-01	361244500000
2016-01-01	352707200000
2017-01-01	371933000000
2018-01-01	414214400000
2019-01-01	432891600000