Year	US Dollars, Monthly Level
1960-01-01	1413848407.2095200
1961-01-01	1488034880.6694500
1962-01-01	1560882076.0913100
1963-01-01	1683884118.0771000
1964-01-01	1865054431.0011199
1965-01-01	2110484809.4353201
1966-01-01	2348630411.7830800
1967-01-01	2328454530.4091300
1968-01-01	2502406467.3250203
1969-01-01	2837366596.5097700
1970-01-01	3559307585.7726000
1971-01-01	4197092747.3965096
1972-01-01	5215596720.9171710
1973-01-01	7103475817.5409000
1974-01-01	9014176716.5637500
1975-01-01	9397484073.7652800
1976-01-01	11453621793.7406000
1977-01-01	14263650725.9205020
1978-01-01	16018001644.7583000
1979-01-01	20205912004.3151970
1980-01-01	24373069910.3795970
1981-01-01	21060867199.6338000
1982-01-01	19534668969.0921970
1983-01-01	19438001858.5965000
1984-01-01	19597748676.7760000
1985-01-01	20954692414.7380000
1986-01-01	26801098709.2333000
1987-01-01	32636256021.0282020
1988-01-01	36535985141.3705100
1989-01-01	39073374471.9180000
1990-01-01	49134892471.8420000
1991-01-01	50868976491.1880000
1992-01-01	53963401392.4712000
1993-01-01	48577908450.4221040
1994-01-01	55416071926.6142040
1995-01-01	69574342274.6564000
1996-01-01	69992692293.2583000
1997-01-01	65373858796.0741040
1998-01-01	68859796356.6491000
1999-01-01	70930867340.1688100
2000-01-01	72413992929.4776000
2001-01-01	74752245969.0446000
2002-01-01	78079281924.7845000
2003-01-01	99557839804.8254100
2004-01-01	118771385851.7580000
2005-01-01	126870038513.9140000
2006-01-01	137973361476.7080000
2007-01-01	163398866215.6670000
2008-01-01	182877180724.0890000
2009-01-01	142687057092.3080000
2010-01-01	158003940870.9680000
2011-01-01	191111324436.3369800
2012-01-01	178714507005.8500000
2013-01-01	182927414659.6569800
2014-01-01	182420439930.7900000
2015-01-01	155818477009.2970000
2016-01-01	157271507153.5470000
2017-01-01	176340893453.9620000