Year	US Dollars, Monthly Level
1993-01-01	6289241338.478760
1994-01-01	6629389621.969701
1995-01-01	8749750407.928180
1996-01-01	11070460023.404000
1997-01-01	11749586540.876600
1998-01-01	13031385761.179300
1999-01-01	7693868969.785319
2000-01-01	9014904389.686850
2001-01-01	10245562540.649100
2002-01-01	11664859956.889400
2003-01-01	16419774968.181902
2004-01-01	22226507306.624900
2005-01-01	26924813675.218400
2006-01-01	36671966282.784294
2007-01-01	54092869658.084900
2008-01-01	71310783533.177200
2009-01-01	55575019023.181800
2010-01-01	64654551079.402100
2011-01-01	79787484102.875400
2012-01-01	77318184679.480790
2013-01-01	81657978659.395890
2014-01-01	82377032510.929690
2015-01-01	73298465720.312910
2016-01-01	75308895995.455700
2017-01-01	83661809105.046600