Year	US Dollars, Monthly Level
1960-01-01	4750213506.165790
1961-01-01	5267579180.550630
1962-01-01	6112785969.433440
1963-01-01	7643756325.290890
1964-01-01	7217547665.726900
1965-01-01	7382267666.930070
1966-01-01	8595440515.364891
1967-01-01	9863586809.231300
1968-01-01	10279394909.499700
1969-01-01	12420411446.306700
1970-01-01	14914846347.912000
1971-01-01	16017652708.201500
1972-01-01	19253928288.967503
1973-01-01	27775890709.036300
1974-01-01	41056469722.102900
1975-01-01	38299754322.433900
1976-01-01	43656109654.159100
1977-01-01	47895739792.844800
1978-01-01	55912414856.793495
1979-01-01	77183922234.574800
1980-01-01	100036951150.876000
1981-01-01	91367897683.932400
1982-01-01	86901187762.210400
1983-01-01	80767878427.396900
1984-01-01	84318819757.236400
1985-01-01	91042833286.266000
1986-01-01	99856277659.841400
1987-01-01	124615603642.072000
1988-01-01	138127042677.970980
1989-01-01	153617656267.884000
1990-01-01	182057100484.159000
1991-01-01	182280098662.937000
1992-01-01	187647604777.292000
1993-01-01	144830282031.691000
1994-01-01	166653419560.842000
1995-01-01	188740122446.309000
1996-01-01	205568907086.951000
1997-01-01	210704588451.765000
1998-01-01	215955235584.240000
1999-01-01	218521212178.909000
2000-01-01	238540772714.676000
2001-01-01	236604328805.487000
2002-01-01	247395099508.203000
2003-01-01	297080720105.970000
2004-01-01	353392076159.052000
2005-01-01	384559018987.824000
2006-01-01	444454813106.088000
2007-01-01	514420685859.245060
2008-01-01	560951655839.079000
2009-01-01	413803282793.489000
2010-01-01	485524718682.698000
2011-01-01	559164566491.769000
2012-01-01	490243722247.285950
2013-01-01	481261171556.119000
2014-01-01	474558972217.746000
2015-01-01	409670874471.795000
2016-01-01	407262364872.761000
2017-01-01	454148515759.591000