Year	US Dollars, Sum Over Component Sub-periods
1988-01-01	0
1989-01-01	0
1990-01-01	-444000000
1991-01-01	-568000000
1992-01-01	-921000000
1993-01-01	-535000000
1994-01-01	-565000000
1995-01-01	-744000000
1996-01-01	-331000000
1997-01-01	-1021000000
1998-01-01	-1066000000
1999-01-01	-915000000
2000-01-01	-711000000
2001-01-01	-586000000
2002-01-01	-926000000
2003-01-01	-1194000000
2004-01-01	-2360000000
2005-01-01	-5167000000
2006-01-01	-8449000000
2007-01-01	-6665000000
2008-01-01	-109552000000
2009-01-01	-77939000000
2010-01-01	-48654000000
2011-01-01	-44585000000
2012-01-01	-30827000000
2013-01-01	-27610000000