Year	US Dollars, Monthly Level
1960-01-01	-275452846.227156000
1961-01-01	296576094.747556000
1962-01-01	137839279.670143000
1963-01-01	375605744.947442000
1964-01-01	145209465.292040020
1965-01-01	-294973310.624154000
1966-01-01	-3160523.468192210
1967-01-01	49199938.930750504
1968-01-01	-281684656.832126000
1969-01-01	253290805.261950020
1970-01-01	325862000.136537000
1971-01-01	626403287.641165000
1972-01-01	1929587382.352310000
1973-01-01	2815979825.416590000
1974-01-01	145415549.158913000
1975-01-01	2191549567.512620000
1976-01-01	2163522993.211220000
1977-01-01	1116446751.233920000
1978-01-01	288646769.826527950
1979-01-01	2186531153.242020000
1980-01-01	1650274770.431650200
1981-01-01	-2029184296.459099800
1982-01-01	-2201276834.286970000
1983-01-01	1593061755.006240100
1984-01-01	588057764.305680000
1985-01-01	-331642372.858855000
1986-01-01	-1251961075.329939800
1987-01-01	-404583628.948322000
1988-01-01	65995166.175476900
1989-01-01	-3745999262.869960000
1990-01-01	863154923.181888000
1991-01-01	3198164843.449400000
1992-01-01	2293511530.854600000
1993-01-01	335816618.661358000
1994-01-01	-2399618427.970910000
1995-01-01	-4433727877.324719000
1996-01-01	-893154540.242706100
1997-01-01	1041535889.972829900
1998-01-01	-4828573988.268830000
1999-01-01	-9326796858.649140000
2000-01-01	-3863701686.593219800
2001-01-01	2539928608.113960000
2002-01-01	-4351158601.867330000
2003-01-01	-14186291075.661098000
2004-01-01	-16837313539.177400000
2005-01-01	-12966048367.701300000
2006-01-01	-9700257664.479470000
2007-01-01	-16080366750.394000000
2008-01-01	-2952881445.788950000
2009-01-01	-2372717017.990370000
2010-01-01	18288664059.728000000
2011-01-01	35501127593.020900000
2012-01-01	7405699165.985240000
2013-01-01	21061169445.459700000
2014-01-01	12091321141.999400000
2015-01-01	-12882438846.031600000
2016-01-01	1755035394.114640000
2017-01-01	9778956741.841959000