Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	2660000000
1981-01-01	2604000000
1982-01-01	3950000000
1983-01-01	1672000000
1984-01-01	1061000000
1985-01-01	-199000000
1986-01-01	804000000
1987-01-01	724000000
1988-01-01	-4671000000
1989-01-01	394000000
1990-01-01	1677000000
1991-01-01	1389000000
1992-01-01	1907000000
1993-01-01	583000000
1994-01-01	1695000000
1995-01-01	3185000000
1996-01-01	1303000000
1997-01-01	2978000000
1998-01-01	1901000000
1999-01-01	6232000000
2000-01-01	3255000000
2001-01-01	1462000000
2002-01-01	-453000000
2003-01-01	-371000000
2004-01-01	384000000
2005-01-01	344000000
2006-01-01	4009000000
2007-01-01	4411000000
2008-01-01	-1388000000
2009-01-01	3959000000
2010-01-01	3674000000
2011-01-01	1680000000
2012-01-01	-3604000000
2013-01-01	-1149000000
2014-01-01	-6687000000