Year	US Dollars, Sum Over Component Sub-periods
1969-01-01	-281000000
1970-01-01	-562000000
1971-01-01	-1309000000
1972-01-01	-1486000000
1973-01-01	-1688000000
1974-01-01	-7122000000
1975-01-01	-6968000000
1976-01-01	-6520000000
1977-01-01	-5049000000
1978-01-01	-6996000000
1979-01-01	-10708000000
1980-01-01	-12739000000
1981-01-01	-11706000000
1982-01-01	-16273000000
1983-01-01	-6773000000
1984-01-01	95000000
1985-01-01	-248000000
1986-01-01	-5323000000
1987-01-01	-1438000000
1988-01-01	4180000000
1989-01-01	1032000000
1990-01-01	-3784000000
1991-01-01	-1407000000
1992-01-01	6109000000
1993-01-01	-676000000
1994-01-01	-1811000000
1995-01-01	-18384000000
1996-01-01	-23502000000
1997-01-01	-30452000000
1998-01-01	-33416000000
1999-01-01	-25335000000
2000-01-01	-24225000000
2001-01-01	-23215000000
2002-01-01	-7637000000
2003-01-01	4177000000
2004-01-01	11679000000
2005-01-01	13985000000
2006-01-01	13643000000
2007-01-01	1551000000
2008-01-01	-28192000000
2009-01-01	-24302000000
2010-01-01	-47273000000
2011-01-01	-52473000000
2012-01-01	-54249000000
2013-01-01	-81227000000
2014-01-01	-91288000000