Year	US Dollars, Monthly Level
1960-01-01	2569274134.3697700
1961-01-01	2757971556.4646600
1962-01-01	2936190866.6077800
1963-01-01	3186375746.1182500
1964-01-01	3664410247.1223097
1965-01-01	3984691276.2673397
1966-01-01	4249068262.9804200
1967-01-01	4546622593.9512005
1968-01-01	4900244133.7158100
1969-01-01	5700173976.1576100
1970-01-01	6754604272.1029300
1971-01-01	7481300647.2944990
1972-01-01	8771892679.7805400
1973-01-01	12236305988.8995000
1974-01-01	15987754981.8618000
1975-01-01	17369167743.1700970
1976-01-01	18364585059.4997980
1977-01-01	19074307728.8495030
1978-01-01	21735070587.9641000
1979-01-01	27533934044.8475000
1980-01-01	30866466525.5770000
1981-01-01	28593222322.9451980
1982-01-01	26810875921.5576970
1983-01-01	27408728841.0062030
1984-01-01	29220929498.8352000
1985-01-01	30414268202.7804000
1986-01-01	37195116411.9161100
1987-01-01	44348344971.8470000
1988-01-01	49503128294.3492050
1989-01-01	51626719497.2447000
1990-01-01	57348397034.1476060
1991-01-01	55125402643.9302000
1992-01-01	56103490895.9463040
1993-01-01	49831075386.9865950
1994-01-01	61380185510.4372000
1995-01-01	79748452904.0442000
1996-01-01	84448619238.9689000
1997-01-01	82810877507.6498100
1998-01-01	84874331875.7499100
1999-01-01	84998540121.3000000
2000-01-01	87775446178.7807000
2001-01-01	78133413231.2710100
2002-01-01	83170412228.2798000
2003-01-01	102456806175.7320000
2004-01-01	122753890205.3020000
2005-01-01	131237154948.4740000
2006-01-01	148332240507.4560000
2007-01-01	169089865424.5420200
2008-01-01	183254674259.3050000
2009-01-01	130975896314.8229800
2010-01-01	158113984420.0340000
2011-01-01	187518697516.6340000
2012-01-01	172795013991.3220200
2013-01-01	167486913996.3260000
2014-01-01	164567345897.1770000
2015-01-01	139813822649.1200000
2016-01-01	139427753650.6880200
2017-01-01	153122062023.1770000