Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	-252797432.9024720
1961-01-01	363972448.7854320
1962-01-01	199507563.7744700
1963-01-01	455861312.6167200
1964-01-01	212184509.3209960
1965-01-01	-324690380.1984400
1966-01-01	113517023.4273930
1967-01-01	62300098.4990516
1968-01-01	-251425442.5009220
1969-01-01	304415455.6370830
1970-01-01	528982682.7774380
1971-01-01	612233307.4607650
1972-01-01	2037738098.7867800
1973-01-01	2931554331.5685800
1974-01-01	262607315.4895030
1975-01-01	2312881887.6907400
1976-01-01	2138829874.1624400
1977-01-01	1129550271.6511000
1978-01-01	210872139.6645910
1979-01-01	2662642521.7974500
1980-01-01	1496921790.6817700
1981-01-01	-2133430452.6591200
1982-01-01	-1981660680.3296000
1983-01-01	152376945.0977150
1984-01-01	-647857278.5318740
1985-01-01	-866776478.5313920
1986-01-01	-1717255555.1223000
1987-01-01	494817942.6911700
1988-01-01	-472431721.9030020
1989-01-01	-3236768765.5240100
1990-01-01	505532512.4497780
1991-01-01	3671268082.7865500
1992-01-01	1780822755.7730500
1993-01-01	57704383.8359838
1994-01-01	-3116702883.3336400
1995-01-01	-4235459749.1772000
1996-01-01	-491822536.6452170
1997-01-01	1853081359.7670700
1998-01-01	-5250266909.5019800
1999-01-01	-9647881264.7881300
2000-01-01	-4760429185.7922700
2001-01-01	1662210165.9885000
2002-01-01	-5547685748.8108500
2003-01-01	-15519528610.4279000
2004-01-01	-18577384309.7825000
2005-01-01	-14213312681.7068000
2006-01-01	-12116724192.0301000
2007-01-01	-20926350724.7792000
2008-01-01	-6637160751.5657600
2009-01-01	-5887651841.5972900
2010-01-01	11336625338.2459000
2011-01-01	22240182970.3447000
2012-01-01	-12046068239.6584000
2013-01-01	4235918465.8063000