Year	US Dollars, Monthly Level
1960-01-01	878994752.9462100
1961-01-01	933536767.8952700
1962-01-01	971685846.5185020
1963-01-01	1069751243.7358301
1964-01-01	1282878524.2005600
1965-01-01	1439226855.6571598
1966-01-01	1563514991.6963500
1967-01-01	1738258670.0858700
1968-01-01	1927890281.1214300
1969-01-01	2201894626.1795600
1970-01-01	2447645307.5028600
1971-01-01	2546640542.4719596
1972-01-01	3283235658.7081200
1973-01-01	4732223403.9722100
1974-01-01	6296935488.3938200
1975-01-01	7254342515.1265300
1976-01-01	7929871793.3378310
1977-01-01	8888632931.6831600
1978-01-01	10885297510.3360000
1979-01-01	13562101794.4817000
1980-01-01	18448835553.5680000
1981-01-01	18175905472.1610000
1982-01-01	17592310200.3240000
1983-01-01	18032764841.0644000
1984-01-01	18855416020.8604000
1985-01-01	19961539224.2576000
1986-01-01	18109981675.2790000
1987-01-01	21430562105.6853000
1988-01-01	22379581398.6690980
1989-01-01	27196230516.1009000
1990-01-01	33953718093.4112970
1991-01-01	34063423359.7129000
1992-01-01	35028490822.8021000
1993-01-01	32038298359.6812000
1994-01-01	34865287764.4984000
1995-01-01	42090995632.9828000
1996-01-01	49411159094.3887000
1997-01-01	48537434887.4040000
1998-01-01	40380146739.7795940
1999-01-01	45396188828.8974000
2000-01-01	60149100271.8758000
2001-01-01	59350028161.8876000
2002-01-01	59748657857.0345000
2003-01-01	68326516019.1385960
2004-01-01	82255614454.7271000
2005-01-01	104066066661.8580000
2006-01-01	122534787720.2300000
2007-01-01	136475676225.2210100
2008-01-01	171655414271.1179800
2009-01-01	116646061358.5479900
2010-01-01	130339760817.7509900
2011-01-01	160737244534.2630000
2012-01-01	160904023625.3270000
2013-01-01	155901229622.6080000
2014-01-01	144540980480.7740200
2015-01-01	103969961801.4380000
2016-01-01	89623441227.3053100
2017-01-01	104228123159.0880000