Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	469000000
1985-01-01	-837000000
1986-01-01	-118000000
1987-01-01	-506000000
1988-01-01	515000000
1989-01-01	971000000
1990-01-01	-468000000
1991-01-01	948000000
1992-01-01	-1190000000
1993-01-01	-2162000000
1994-01-01	1832000000
1995-01-01	2432000000
1996-01-01	1499000000
1997-01-01	-987000000
1998-01-01	-713000000
1999-01-01	1302000000
2000-01-01	-2661000000
2001-01-01	-2127000000
2002-01-01	-758000000
2003-01-01	4489000000
2004-01-01	838000000
2005-01-01	1964000000
2006-01-01	-228000000
2007-01-01	517000000
2008-01-01	2912000000
2009-01-01	3078000000
2010-01-01	928000000
2011-01-01	9135000000
2012-01-01	1059000000
2013-01-01	2532000000