Year	US Dollars, Monthly Level
1989-01-01	6920700328.0000000
1990-01-01	5547062450.0000000
1991-01-01	5178910026.0000000
1992-01-01	5889798572.0000000
1993-01-01	4245686891.0000000
1994-01-01	3229740074.0000000
1995-01-01	-935629896.0000000
1996-01-01	-1405828952.0000000
1997-01-01	-1359429868.0000000
1998-01-01	-2085292062.9999998
1999-01-01	-1275196510.0000000
2000-01-01	721684581.0000000
2001-01-01	46851453.0000002
2002-01-01	1980692448.0000000
2003-01-01	5441375810.0000000
2004-01-01	8238529701.9999990
2005-01-01	8344178468.9999990
2006-01-01	10777023520.0000000
2007-01-01	13698826767.0000000
2008-01-01	10216589727.0000000
2009-01-01	4820710985.0000000
2010-01-01	4007376379.0000000
2011-01-01	6521568382.0000000
2012-01-01	1192540961.0000000
2013-01-01	-2968949000.0000000
2014-01-01	-4671130000.0000000
2015-01-01	-2699582436.0000000