Year	US Dollars
2000-01-01	546500000
2001-01-01	185000000
2002-01-01	276500000
2003-01-01	642100000
2004-01-01	-566900000
2005-01-01	1097000000
2006-01-01	1551600000
2007-01-01	2029900000
2008-01-01	2485100000
2009-01-01	1116600000
2010-01-01	2739600000
2011-01-01	2621200000
2012-01-01	600100000
2013-01-01	1631200000
2014-01-01	1069400000
2015-01-01	469600000
2016-01-01	498100000
2017-01-01	1773900000
2018-01-01	85900000
2019-01-01	-524900000