Year	US Dollars
2000-01-01	14670500000
2001-01-01	8326700000
2002-01-01	4264600000
2003-01-01	9422900000
2004-01-01	15595600000
2005-01-01	30068800000
2006-01-01	45311300000
2007-01-01	42188400000
2008-01-01	60244800000
2009-01-01	28288600000
2010-01-01	36713900000
2011-01-01	66139600000
2012-01-01	79133300000
2013-01-01	70205900000
2014-01-01	54413300000
2015-01-01	4015800000
2016-01-01	-4997200000
2017-01-01	2375100000
2018-01-01	7840100000
2019-01-01	5010200000