Year	US Dollars, Sum Over Component Sub-periods
1960-01-01	-943000000
1961-01-01	-748000000
1962-01-01	-875000000
1963-01-01	-867000000
1964-01-01	-1224000000
1965-01-01	-1334000000
1966-01-01	-1271000000
1967-01-01	-1135000000
1968-01-01	-697000000
1969-01-01	-230000000
1970-01-01	-408000000
1971-01-01	-682000000
1972-01-01	-306000000
1973-01-01	-496000000
1974-01-01	-1364000000
1975-01-01	-257000000
1976-01-01	792000000
1977-01-01	940000000
1978-01-01	-892000000
1979-01-01	-2219000000
1980-01-01	-5644000000
1981-01-01	-5703000000
1982-01-01	-4818000000
1983-01-01	-4103000000
1984-01-01	-4052000000
1985-01-01	-5614000000
1986-01-01	-5431000000
1987-01-01	-5779000000
1988-01-01	-6670000000
1989-01-01	-6097000000
1990-01-01	-5199000000
1991-01-01	-2653000000
1992-01-01	-2911000000
1993-01-01	-2088000000
1994-01-01	-4150000000
1995-01-01	-6713000000
1996-01-01	-10045000000
1997-01-01	-10062000000
1998-01-01	-10709000000
1999-01-01	-8708000000
2000-01-01	-10570000000
2001-01-01	-6432000000
2002-01-01	-3552000000
2003-01-01	-7188000000
2004-01-01	-17636000000
2005-01-01	-32543000000
2006-01-01	-42876000000
2007-01-01	-54198000000
2008-01-01	-94368000000
2009-01-01	-79390000000
2010-01-01	-98052000000