Year	US Dollars
2004-01-01	-8811300000
2005-01-01	4349700000
2006-01-01	2105600000
2007-01-01	-3007100000
2008-01-01	16713800000
2009-01-01	-12865300000
2010-01-01	2266600000
2011-01-01	20207700000
2012-01-01	11027500000
2013-01-01	2680900000
2014-01-01	6106300000
2015-01-01	-11633400000
2016-01-01	-14717400000
2017-01-01	1419600000
2018-01-01	403100000
2019-01-01	-3695900000