Year	US Dollars, Monthly Level
1960-01-01	3909777273.8059800
1961-01-01	4214374612.3020697
1962-01-01	4531999074.4186590
1963-01-01	5034484044.2531200
1964-01-01	5883810772.7356100
1965-01-01	6493404982.9523800
1966-01-01	7195479114.3837400
1967-01-01	7210870422.1482200
1968-01-01	8183330686.7000410
1969-01-01	9938835744.4611420
1970-01-01	11409442987.3221990
1971-01-01	12338385067.0677000
1972-01-01	15414922737.0489000
1973-01-01	22148753629.3433000
1974-01-01	29944703109.3999000
1975-01-01	30739953793.8165000
1976-01-01	35401895172.0017000
1977-01-01	40505658781.1006000
1978-01-01	48766736803.7410000
1979-01-01	61089046698.1012950
1980-01-01	71508446554.3273000
1981-01-01	62344696122.8528060
1982-01-01	58169319215.5264000
1983-01-01	55320998965.7430040
1984-01-01	55329604340.9123000
1985-01-01	56205817998.4175000
1986-01-01	68595763602.5430000
1987-01-01	83466107380.3848000
1988-01-01	92285526146.4302000
1989-01-01	99034555620.1829000
1990-01-01	120574931320.0800000
1991-01-01	121088407113.7880000
1992-01-01	124722367228.0990000
1993-01-01	114411325875.5000000
1994-01-01	130100579697.5869900
1995-01-01	165876131626.4740000
1996-01-01	168140558187.5619800
1997-01-01	158965344720.2870000
1998-01-01	167539468605.7989800
1999-01-01	164243166322.7840000
2000-01-01	177656123692.9060000
2001-01-01	179032055627.3000000
2002-01-01	197892573655.5300000
2003-01-01	235218726885.4260000
2004-01-01	284184171844.4400000
2005-01-01	318377621293.0780000
2006-01-01	352460357409.6290000
2007-01-01	413067008927.8830000
2008-01-01	464237408924.8200000
2009-01-01	354474853631.3500400
2010-01-01	391217503378.2260000
2011-01-01	467036943411.9950000
2012-01-01	440152661748.5760000
2013-01-01	451770978699.4320000
2014-01-01	451958767845.1800000
2015-01-01	375451055981.3140000
2016-01-01	379729052514.3550000
2017-01-01	408056286287.2749600