Year	US Dollars, Monthly Level
1960-01-01	538875349.6028011
1961-01-01	655589343.3557260
1962-01-01	605776149.1970019
1963-01-01	660293079.8491720
1964-01-01	771430596.9091780
1965-01-01	902439120.6113910
1966-01-01	997390518.0542380
1967-01-01	1010282263.8155600
1968-01-01	1051619939.5360299
1969-01-01	1178081087.2982000
1970-01-01	1549054092.2250400
1971-01-01	1736411143.2163600
1972-01-01	2149180444.5340600
1973-01-01	2889852068.4170600
1974-01-01	4290490594.1835000
1975-01-01	4132861800.3703100
1976-01-01	4381505612.8084710
1977-01-01	5035923362.7154600
1978-01-01	5286903320.7773800
1979-01-01	6815632600.9386600
1980-01-01	9446958916.2861200
1981-01-01	9922666994.0611400
1982-01-01	9594505340.7211590
1983-01-01	8234936361.3952700
1984-01-01	7918318486.2562000
1985-01-01	7661119516.5107190
1986-01-01	9427180734.3540200
1987-01-01	13250273315.6534000
1988-01-01	15793633735.5159000
1989-01-01	18849169075.1714000
1990-01-01	24966312253.3787000
1991-01-01	26127798334.2653000
1992-01-01	29804241739.6651000
1993-01-01	23568338337.7378000
1994-01-01	27387553771.3391000
1995-01-01	33395309168.0104000
1996-01-01	35836638750.2586000
1997-01-01	35355447803.5525000
1998-01-01	38109682113.3108000
1999-01-01	39738367408.8656000
2000-01-01	40060450135.6880000
2001-01-01	39463645506.9000000
2002-01-01	40053272936.8387000
2003-01-01	47302332334.7888000
2004-01-01	54347492154.8135000
2005-01-01	63980279433.0024000
2006-01-01	71062393885.1246000
2007-01-01	82161611095.9953000
2008-01-01	94468733303.7532000
2009-01-01	71624813579.3860000
2010-01-01	77422547691.5758000
2011-01-01	83156903884.4553000
2012-01-01	72271175986.7386000
2013-01-01	75883468915.9870900
2014-01-01	78596304778.6393900
2015-01-01	66898761561.0458000
2016-01-01	67892772482.6204000
2017-01-01	78766826388.8059000