Year	US Dollars, Monthly Level
1960-01-01	3661795634.237400
1961-01-01	4214698015.783460
1962-01-01	4703574506.211200
1963-01-01	5088584225.857361
1964-01-01	5949574054.386100
1965-01-01	7211544217.992030
1966-01-01	8050926502.556390
1967-01-01	8735376915.039719
1968-01-01	10188469926.479100
1969-01-01	11664799580.658600
1970-01-01	13148178898.296001
1971-01-01	15148641193.190800
1972-01-01	18486376092.205097
1973-01-01	22152711939.552000
1974-01-01	30072514910.858300
1975-01-01	34828306700.597700
1976-01-01	37021561447.043100
1977-01-01	45085880277.180900
1978-01-01	55537668169.776700
1979-01-01	72014677600.398400
1980-01-01	77668422891.277600
1981-01-01	75269159024.660000
1982-01-01	73964180121.301790
1983-01-01	72766861406.865100
1984-01-01	73242753805.368100
1985-01-01	78797599193.882400
1986-01-01	97770195705.416700
1987-01-01	115924100757.653000
1988-01-01	128020014971.269010
1989-01-01	140735558500.874000
1990-01-01	170444833412.923000
1991-01-01	169337723205.459000
1992-01-01	178960567086.976000
1993-01-01	165226155863.067000
1994-01-01	189349541515.339020
1995-01-01	214623353597.232030
1996-01-01	248794426759.501000
1997-01-01	241401514204.158000
1998-01-01	242944141176.093020
1999-01-01	234113265713.815980
2000-01-01	240984490609.734000
2001-01-01	245524270752.260000
2002-01-01	255501759713.408020
2003-01-01	300419441602.626040
2004-01-01	351183479973.768000
2005-01-01	372543234752.741000
2006-01-01	418891392800.800050
2007-01-01	502062039510.165000
2008-01-01	542296868304.347960
2009-01-01	405364099287.446000
2010-01-01	445382262927.672000
2011-01-01	522278929273.423950
2012-01-01	502251234389.089000
2013-01-01	519679157198.194950
2014-01-01	529920506707.460940
2015-01-01	456401658135.981000
2016-01-01	461032306062.425000
2017-01-01	507508787210.246000