Year	US Dollars
2000-01-01	1659300000
2001-01-01	4151900000
2002-01-01	3823900000
2003-01-01	5753600000
2004-01-01	7551600000
2005-01-01	7481900000
2006-01-01	9458800000
2007-01-01	11457700000
2008-01-01	26594500000
2009-01-01	6388700000
2010-01-01	23951600000
2011-01-01	52123600000
2012-01-01	62000300000
2013-01-01	60461000000
2014-01-01	49409900000
2015-01-01	13750800000
2016-01-01	-8324500000
2017-01-01	2102500000
2018-01-01	4659000000
2019-01-01	3522900000