Year	US Dollars, Monthly Level
1990-01-01	17970035970.94180
1991-01-01	17768000000.00000
1992-01-01	18149000000.00000
1993-01-01	21125000000.00000
1994-01-01	25021000000.00000
1995-01-01	30632000000.00000
1996-01-01	33110000000.00000
1997-01-01	34998000000.00000
1998-01-01	33460000000.00000
1999-01-01	35671000000.00000
2000-01-01	42378000000.00000
2001-01-01	43352000000.00000
2002-01-01	50382000000.00000
2003-01-01	58960000000.00000
2004-01-01	76663000000.00000
2005-01-01	99615000000.00000
2006-01-01	121807700000.00000
2007-01-01	150158900000.00000
2008-01-01	194828300000.00000
2009-01-01	164908700000.00000
2010-01-01	226351400000.00000
2011-01-01	302904889440.00000
2012-01-01	296828127280.00000
2013-01-01	314815244650.00000
2014-01-01	322480464030.00000
2015-01-01	267791985819.99997
2016-01-01	264424354119.99997
2017-01-01	299152029370.00000