Year	US Dollars, Monthly Level
1960-01-01	11404459487.950800
1961-01-01	12724446883.204700
1962-01-01	13315968669.595600
1963-01-01	14701477193.245600
1964-01-01	16295975328.128498
1965-01-01	17833226910.299700
1966-01-01	20032209677.255000
1967-01-01	21807257147.287900
1968-01-01	25017636114.518100
1969-01-01	29098764567.906400
1970-01-01	34343811110.524696
1971-01-01	39001130163.254105
1972-01-01	46590665982.742100
1973-01-01	67834435201.550210
1974-01-01	89880169687.002290
1975-01-01	90660427986.038300
1976-01-01	101196633665.110000
1977-01-01	117240831392.138000
1978-01-01	142097047965.747000
1979-01-01	172482896330.833000
1980-01-01	193257798293.676000
1981-01-01	175958395094.111020
1982-01-01	176034938301.913000
1983-01-01	168548239095.153000
1984-01-01	171952963406.777980
1985-01-01	185318310981.871000
1986-01-01	244597089311.544000
1987-01-01	294440162813.431000
1988-01-01	321355578374.599000
1989-01-01	341110846571.475950
1990-01-01	414735015806.860050
1991-01-01	407607233329.775000
1992-01-01	429026896749.172000
1993-01-01	380934752499.219000
1994-01-01	428231957151.926000
1995-01-01	523284685390.248000
1996-01-01	525134558978.359000
1997-01-01	513914964370.722050
1998-01-01	542162964509.737000
1999-01-01	540387781187.201000
2000-01-01	551177840095.857900
2001-01-01	572100708504.752000
2002-01-01	616824644974.141000
2003-01-01	752960294811.176000
2004-01-01	905851026048.355000
2005-01-01	968510140830.465100
2006-01-01	1109615067532.280000
2007-01-01	1323296888011.610000
2008-01-01	1444498442133.980000
2009-01-01	1117116901938.120000
2010-01-01	1251500772371.270000
2011-01-01	1469163254147.780000
2012-01-01	1403866797857.680000
2013-01-01	1446477531070.609900
2014-01-01	1494352246377.740000
2015-01-01	1322823911593.710000
2016-01-01	1329633739180.700200
2017-01-01	1447109971438.920000