Year	US Dollars
2000-01-01	-186600000
2001-01-01	-51800000
2002-01-01	-768400000
2003-01-01	-2020600000
2004-01-01	-2589200000
2005-01-01	167300000
2006-01-01	3707600000
2007-01-01	9018900000
2008-01-01	16453500000
2009-01-01	10172800000
2010-01-01	15039600000
2011-01-01	17146100000
2012-01-01	14916300000
2013-01-01	12317800000
2014-01-01	10430500000
2015-01-01	-222500000
2016-01-01	-1363400000
2017-01-01	1412900000
2018-01-01	2555700000
2019-01-01	3333200000