Year	US Dollars, Monthly Level
1960-01-01	1465774603.9943700
1961-01-01	1620881982.6799500
1962-01-01	1659754117.1247702
1963-01-01	1816183219.4608102
1964-01-01	1972592136.3047800
1965-01-01	2201541133.4482102
1966-01-01	2400460719.3324900
1967-01-01	2750181592.5529600
1968-01-01	2698318189.6175200
1969-01-01	2933906787.1002502
1970-01-01	3683790657.4021600
1971-01-01	4067304329.7525496
1972-01-01	4376642012.4732000
1973-01-01	6306514590.8308400
1974-01-01	8415278104.8272390
1975-01-01	9659444447.9221000
1976-01-01	11084095372.7803000
1977-01-01	12939673874.9186000
1978-01-01	11468995812.9978000
1979-01-01	13656510403.3095990
1980-01-01	16915916274.3483000
1981-01-01	15615303638.5059990
1982-01-01	15476385161.9306000
1983-01-01	13506631658.3053000
1984-01-01	13861052620.1225990
1985-01-01	15489516496.9672000
1986-01-01	20244974930.9838030
1987-01-01	22549818678.7035980
1988-01-01	23134024974.0716000
1989-01-01	23713741974.6659000
1990-01-01	27107401738.2862000
1991-01-01	25452503083.8102000
1992-01-01	26042924937.7002000
1993-01-01	24003849659.8493000
1994-01-01	27507673160.7699000
1995-01-01	32957494108.7105980
1996-01-01	35493373127.5993960
1997-01-01	35613225827.1942000
1998-01-01	37441138163.2615000
1999-01-01	34092874400.1464000
2000-01-01	34564912094.5138000
2001-01-01	32887155222.1877020
2002-01-01	34819922529.2160000
2003-01-01	40000406805.2085950
2004-01-01	48311314912.3628000
2005-01-01	55644026304.6435000
2006-01-01	64245579044.6242900
2007-01-01	80132803468.2435900
2008-01-01	90211575073.6320000
2009-01-01	68800395874.6980900
2010-01-01	77062784780.7036000
2011-01-01	90718261946.4625100
2012-01-01	87241607838.2943000
2013-01-01	89665875682.8293900
2014-01-01	89428551495.4105000
2015-01-01	76337707675.1033000
2016-01-01	74971882680.8641000
2017-01-01	82760243687.3227000