Year	US Dollars, Monthly Level
1990-01-01	-5612623621.7459000
1991-01-01	-2755640195.6085800
1992-01-01	-3607903449.6911697
1993-01-01	-1182366108.8980699
1994-01-01	-1786511139.1267600
1995-01-01	-4061335427.1751100
1996-01-01	-4866150275.4583610
1997-01-01	-6454962444.1469100
1998-01-01	-9525636188.8883600
1999-01-01	-11216857200.7815020
2000-01-01	-9172702663.5923200
2001-01-01	-6986654881.5442705
2002-01-01	-5957411693.7273890
2003-01-01	-13463343921.3536000
2004-01-01	-23022770642.9993020
2005-01-01	-43256276612.3896940
2006-01-01	-56317980815.3128000
2007-01-01	-78361085100.7162000
2008-01-01	-125317897126.8180000
2009-01-01	-91318550772.5183000
2010-01-01	-123614030105.1330000
2011-01-01	-161720826949.2859800
2012-01-01	-192841208016.6070000
2013-01-01	-150484105640.7380000
2014-01-01	-140232550365.5160000
2015-01-01	-125540210725.6790000
2016-01-01	-97012269416.4036000
2017-01-01	-150891779850.9220000