Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	-252797432.9024720
1961-01-01	366205408.5939310
1962-01-01	201749221.7944080
1963-01-01	458106934.8463590
1964-01-01	214418030.4717430
1965-01-01	-321331514.1963870
1966-01-01	115742847.4161650
1967-01-01	63412600.2579632
1968-01-01	-250312940.5429530
1969-01-01	314414503.4499800
1970-01-01	516732557.4920650
1971-01-01	600874619.0106580
1972-01-01	2011506244.9697400
1973-01-01	2948647942.8313700
1974-01-01	220763292.6917250
1975-01-01	2295768931.2081100
1976-01-01	2093479326.6873700
1977-01-01	1117332913.7473000
1978-01-01	192535431.8676700
1979-01-01	2712944332.6626400
1980-01-01	1362392642.6997000
1981-01-01	-1910311580.5211900
1982-01-01	-2044538347.7709700
1983-01-01	134344170.5299380
1984-01-01	-603147236.3057230
1985-01-01	-797629926.2553180
1986-01-01	-1771400241.7571400
1987-01-01	527712487.6791270
1988-01-01	-510694786.9827490
1989-01-01	-3301599014.3693900
1990-01-01	435319663.4984200
1991-01-01	3700083721.1113500
1992-01-01	1856430646.8879000
1993-01-01	101152390.4889600
1994-01-01	-3145189270.1276400
1995-01-01	-4291774469.4251800
1996-01-01	-418205787.5295320
1997-01-01	1827117449.6022000
1998-01-01	-5216981724.5493900
1999-01-01	-9659496665.9496700
2000-01-01	-5008905170.7910400
2001-01-01	1840986888.8458300
2002-01-01	-5393447593.8757300
2003-01-01	-15346325377.7333000
2004-01-01	-18442013880.3737000
2005-01-01	-14428123452.7150000
2006-01-01	-12312519610.9194000
2007-01-01	-20621797061.8381000
2008-01-01	-7053027139.8747400
2009-01-01	-5195078674.9078700
2010-01-01	11126568925.7159000
2011-01-01	21951282426.0767000
2012-01-01	-12121640857.5249000
2013-01-01	4231093957.3031000