Year	U.S. Dollars
2000-01-01	18292000000
2001-01-01	22152700000
2002-01-01	24636600000
2003-01-01	30833700000
2004-01-01	43151600000
2005-01-01	57124800000
2006-01-01	81003300000
2007-01-01	104849900000
2008-01-01	133441500000
2009-01-01	115308700000
2010-01-01	148047300000
2011-01-01	192626500000
2012-01-01	207998600000
2013-01-01	236634600000
2014-01-01	221415600000
2015-01-01	184388400000
2016-01-01	133667800000
2017-01-01	160838500000
2018-01-01	179250400000
2019-01-01	190469300000