Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	0
1989-01-01	0
1990-01-01	-78000000
1991-01-01	-49000000
1992-01-01	-148000000
1993-01-01	-88000000
1994-01-01	-112000000
1995-01-01	-121000000
1996-01-01	83000000
1997-01-01	-89000000
1998-01-01	-654000000
1999-01-01	-514000000
2000-01-01	-179000000
2001-01-01	-123000000
2002-01-01	362000000
2003-01-01	619000000
2004-01-01	2020000000
2005-01-01	1790000000
2006-01-01	484000000
2007-01-01	5445000000
2008-01-01	-14369000000
2009-01-01	-3093000000
2010-01-01	829000000
2011-01-01	-1031000000
2012-01-01	2628000000
2013-01-01	3840000000