Year	US Dollars, Monthly Level
1960-01-01	979115478.2015580
1961-01-01	1057002855.5079001
1962-01-01	1107411041.9246400
1963-01-01	1125122770.1382500
1964-01-01	1282261094.5477898
1965-01-01	1417800629.0503900
1966-01-01	1486755841.3531900
1967-01-01	1533884107.8449000
1968-01-01	1623973133.9745200
1969-01-01	1978382676.8206400
1970-01-01	2304251815.2623200
1971-01-01	2352955889.4736204
1972-01-01	2907073550.6542997
1973-01-01	3827690779.0630302
1974-01-01	5493289842.0198800
1975-01-01	5500058179.0129390
1976-01-01	6303316372.6567500
1977-01-01	7673982395.6869000
1978-01-01	8613130872.3829200
1979-01-01	11184283164.2969000
1980-01-01	14175553019.3892000
1981-01-01	14064980538.0865000
1982-01-01	13118340244.3982000
1983-01-01	12516619243.8792000
1984-01-01	13476885252.5570010
1985-01-01	13607286297.2528000
1986-01-01	16294723896.5634000
1987-01-01	19485452748.7745970
1988-01-01	22092013538.4071000
1989-01-01	23398662645.9710000
1990-01-01	26585861339.6423000
1991-01-01	23016105049.7077000
1992-01-01	23932537230.5292970
1993-01-01	23417672325.8193000
1994-01-01	29773307283.0684000
1995-01-01	42233504027.6280000
1996-01-01	41979281640.0998000
1997-01-01	41950104751.1769000
1998-01-01	43477130655.0833000
1999-01-01	41815499034.4172000
2000-01-01	45855283525.8173000
2001-01-01	43152002231.5165940
2002-01-01	45338110636.5266000
2003-01-01	53095139446.3529050
2004-01-01	61250441242.0989000
2005-01-01	65355880125.4032060
2006-01-01	77412986372.5150000
2007-01-01	90134030404.9891000
2008-01-01	96505647864.8678900
2009-01-01	62756689662.5724950
2010-01-01	68995671370.9086000
2011-01-01	78990778357.0400000
2012-01-01	73476229726.0152000
2013-01-01	74677963263.6366000
2014-01-01	74135639952.2967000
2015-01-01	59861759790.8822000
2016-01-01	57833134711.6497000
2017-01-01	68082538520.6705900