Year	US Dollars, Monthly Level
1993-01-01	-851791355.22020300
1994-01-01	103414314.47962500
1995-01-01	-182361285.85558900
1996-01-01	-2260402071.38204000
1997-01-01	-2141860513.26802000
1998-01-01	-2291508676.96448000
1999-01-01	-729500354.98044400
2000-01-01	-638750185.23779800
2001-01-01	-1486212815.60336000
2002-01-01	-1477894920.84332010
2003-01-01	-506127941.66424304
2004-01-01	-1462078091.74174000
2005-01-01	-2127683805.74003000
2006-01-01	-2553440288.11114000
2007-01-01	-1792969326.07537000
2008-01-01	-2763059216.39000000
2009-01-01	365656911.84789900
2010-01-01	-322762852.87838900
2011-01-01	-114717368.71336700
2012-01-01	3198817653.05400000
2013-01-01	3858235808.84782000
2014-01-01	4363302644.06788000
2015-01-01	1922343823.66583000
2016-01-01	1956138599.92746020
2017-01-01	1004951855.01794990