Year	US Dollars, Sum Over Component Sub-periods
1979-01-01	3215000000
1980-01-01	3472000000
1981-01-01	-625000000
1982-01-01	4542000000
1983-01-01	24000000
1984-01-01	-7027000000
1985-01-01	457000000
1986-01-01	3836000000
1987-01-01	-1015000000
1988-01-01	-1249000000
1989-01-01	-886000000
1990-01-01	-481000000
1991-01-01	369000000
1992-01-01	-14670000000
1993-01-01	-8709000000
1994-01-01	-7215000000
1995-01-01	-12919000000
1996-01-01	-8666000000
1997-01-01	7907000000
1998-01-01	7970000000
1999-01-01	7822000000
2000-01-01	2262000000
2001-01-01	-3307000000
2002-01-01	-302000000
2003-01-01	-8496000000
2004-01-01	-2244000000
2005-01-01	-4319000000
2006-01-01	-30569000000
2007-01-01	-87484000000
2008-01-01	-2969000000
2009-01-01	-46651000000
2010-01-01	-49101000000
2011-01-01	-58637000000
2012-01-01	-18900000000
2013-01-01	5926000000
2014-01-01	-10833000000