Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	-1439000000
1985-01-01	-1013000000
1986-01-01	-1465000000
1987-01-01	-806000000
1988-01-01	1596000000
1989-01-01	938000000
1990-01-01	-2625000000
1991-01-01	250000000
1992-01-01	-974000000
1993-01-01	-6433000000
1994-01-01	2631000000
1995-01-01	-2339000000
1996-01-01	-2437000000
1997-01-01	-2638000000
1998-01-01	2000000000
1999-01-01	-925000000
2000-01-01	-9920000000
2001-01-01	3760000000
2002-01-01	-626000000
2003-01-01	-7554000000
2004-01-01	-14198000000
2005-01-01	-21449000000
2006-01-01	-31836000000
2007-01-01	-37781000000
2008-01-01	-40372000000
2009-01-01	-12124000000
2010-01-01	-45420000000
2011-01-01	-75082000000
2012-01-01	-48497000000
2013-01-01	-65110000000