Year	US Dollars, Monthly Level
1999-01-01	12128435955.3261010
2000-01-01	-55287547020.8435000
2001-01-01	-4027740268.9176397
2002-01-01	39793598615.7277000
2003-01-01	18929051370.0663000
2004-01-01	-3976581855.2510500
2005-01-01	-75708091126.9721000
2006-01-01	-166909205318.3480000
2007-01-01	-206069819326.5930200
2008-01-01	-294474269687.4250500
2009-01-01	-107148450435.8860000
2010-01-01	-141235832665.8560200
2011-01-01	-145433813257.3460000
2012-01-01	-56056236334.9365000
2013-01-01	154324918865.8350000
2014-01-01	118038574487.5520000
2015-01-01	151453936461.9870000
2016-01-01	114513784610.0450000
2017-01-01	97795173518.4646000