Year	US Dollars, Monthly Level
1992-01-01	76837953780.91810
1993-01-01	99065750916.63350
1994-01-01	113168739464.74701
1995-01-01	130264315471.26100
1996-01-01	136977983208.55501
1997-01-01	141477879268.08102
1998-01-01	140538028001.91000
1999-01-01	165784608623.74600
2000-01-01	225514899191.91800
2001-01-01	245589066330.46300
2002-01-01	295967933009.66600
2003-01-01	414617613720.54100
2004-01-01	559569578698.50210
2005-01-01	662103995762.95090
2006-01-01	796227821121.23690
2007-01-01	959630157621.50900
2008-01-01	1125289035272.79000
2009-01-01	1005503352424.82010
2010-01-01	1403207109381.04000
2011-01-01	1753127773663.55000
2012-01-01	1820641185560.56000
2013-01-01	1952593101387.45000
2014-01-01	1967488978558.71000
2015-01-01	1684910053779.23020
2016-01-01	1587419388712.60000
2017-01-01	1859834451506.99000