Year	US Dollars, Monthly Level
1960-01-01	5572963050.891080
1961-01-01	5837990549.358311
1962-01-01	5925954198.695889
1963-01-01	6459144089.950540
1964-01-01	7673956258.040010
1965-01-01	8120549187.685491
1966-01-01	9627808912.007150
1967-01-01	10621141085.652600
1968-01-01	12651485633.889700
1969-01-01	13806928728.643900
1970-01-01	16122327177.283900
1971-01-01	17665092472.342300
1972-01-01	20302071579.146500
1973-01-01	25372582206.532300
1974-01-01	33191654414.786500
1975-01-01	32777518888.557304
1976-01-01	38956185155.003000
1977-01-01	42012720324.402306
1978-01-01	46681479099.986100
1979-01-01	56089584296.452200
1980-01-01	64931769243.692200
1981-01-01	69831347570.265810
1982-01-01	68540492849.585700
1983-01-01	73612994841.636200
1984-01-01	86567555931.278610
1985-01-01	87365374690.144200
1986-01-01	86852882644.504100
1987-01-01	94362573880.326400
1988-01-01	112552122318.362000
1989-01-01	117149667453.792000
1990-01-01	127673544653.379000
1991-01-01	127399800894.081000
1992-01-01	134651781569.554000
1993-01-01	145306013868.181000
1994-01-01	165129181981.437000
1995-01-01	191136714549.883000
1996-01-01	202256587760.154000
1997-01-01	215204220507.992000
1998-01-01	214640590600.373020
1999-01-01	239343425728.991000
2000-01-01	278172083481.173000
2001-01-01	261196257812.260000
2002-01-01	252507834933.567020
2003-01-01	272551779533.932000
2004-01-01	317178981665.528000
2005-01-01	360665308549.281000
2006-01-01	388241836716.090940
2007-01-01	420105644229.188000
2008-01-01	456325718860.057000
2009-01-01	316408778639.646000
2010-01-01	387351821880.175000
2011-01-01	451517074058.121030
2012-01-01	455561189670.167000
2013-01-01	458216999295.549000
2014-01-01	476995376391.665000
2015-01-01	410362665238.300000
2016-01-01	390170012936.576970
2017-01-01	420950344483.058040