Year	US Dollars, Monthly Level
1960-01-01	-72954069.04988930
1961-01-01	-182653139.79298002
1962-01-01	-245146950.59502402
1963-01-01	-344924472.36783300
1964-01-01	-171578642.74563000
1965-01-01	-124655830.27629799
1966-01-01	-245352000.50097200
1967-01-01	-203897496.74805897
1968-01-01	-306552556.14626500
1969-01-01	-273781124.24251300
1970-01-01	-348663461.77267200
1971-01-01	-616096878.12956900
1972-01-01	-744912507.28043810
1973-01-01	-821186839.59531000
1974-01-01	-2308421051.42722000
1975-01-01	-3401575583.03064000
1976-01-01	-3328777625.43484970
1977-01-01	-4123152459.15803960
1978-01-01	-2393484009.41735000
1979-01-01	-2658287156.35519030
1980-01-01	-5031537450.39835000
1981-01-01	-4397804909.81586900
1982-01-01	-3272091046.65011020
1983-01-01	-3347300351.96130000
1984-01-01	-3778581648.39030030
1985-01-01	-3477065396.65786000
1986-01-01	-3600696038.51757000
1987-01-01	-3961913151.14628000
1988-01-01	-2544767770.64618000
1989-01-01	-4193644785.93414970
1990-01-01	-9154811705.14422000
1991-01-01	-7130242350.75589000
1992-01-01	-7999580060.28231000
1993-01-01	-13475489829.54640000
1994-01-01	-4786549479.97461000
1995-01-01	-13162579440.45990000
1996-01-01	-19391220253.03430000
1997-01-01	-21358737427.33430000
1998-01-01	-17906469690.43370000
1999-01-01	-13239189787.87000000
2000-01-01	-25529860289.01260000
2001-01-01	-10351554516.92520000
2002-01-01	-14252087893.52580000
2003-01-01	-20767357112.51480000
2004-01-01	-33858781823.67940000
2005-01-01	-41198648477.99280000
2006-01-01	-52663624927.98070000
2007-01-01	-58465714389.69890600
2008-01-01	-67655893501.42090600
2009-01-01	-35247009417.58710500
2010-01-01	-71417356575.61569000
2011-01-01	-106387091645.35701000
2012-01-01	-85215155238.96330000
2013-01-01	-97526783175.95149000
2014-01-01	-84429652581.41650000
2015-01-01	-63454985112.31860000
2016-01-01	-54672821580.25000000
2017-01-01	-77372883585.84929000