Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	-61000000
1961-01-01	13000000
1962-01-01	10000000
1963-01-01	-81000000
1964-01-01	-151000000
1965-01-01	102000000
1966-01-01	5000000
1967-01-01	-101000000
1968-01-01	-201000000
1969-01-01	-22000000
1970-01-01	-24000000
1971-01-01	-125000000
1972-01-01	-255000000
1973-01-01	-85000000
1974-01-01	-233000000
1975-01-01	-468000000
1976-01-01	-288000000
1977-01-01	-461000000
1978-01-01	438000000
1979-01-01	301000000
1980-01-01	-362000000
1981-01-01	-355000000
1982-01-01	369000000
1983-01-01	-851000000
1984-01-01	386000000
1985-01-01	508000000
1986-01-01	192000000
1987-01-01	-407000000
1988-01-01	-17000000
1989-01-01	-284000000
1990-01-01	-579000000
1991-01-01	659000000
1992-01-01	1185000000
1993-01-01	-807000000
1994-01-01	1602000000
1995-01-01	755000000
1996-01-01	-1934000000
1997-01-01	-1323000000
1998-01-01	1286000000
1999-01-01	-1000000
2000-01-01	334000000
2001-01-01	-716000000
2002-01-01	-190000000
2003-01-01	479000000
2004-01-01	595000000
2005-01-01	-557000000
2006-01-01	894000000
2007-01-01	1334000000
2008-01-01	1033000000
2009-01-01	-388000000
2010-01-01	-3596000000