Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	4000000
1981-01-01	-35000000
1982-01-01	-97000000
1983-01-01	-80000000
1984-01-01	-82000000
1985-01-01	-93000000
1986-01-01	-96000000
1987-01-01	-209000000
1988-01-01	-353000000
1989-01-01	-318000000
1990-01-01	-331000000
1991-01-01	-330000000
1992-01-01	-407000000
1993-01-01	-475000000
1994-01-01	-437000000
1995-01-01	-488000000
1996-01-01	-598000000
1997-01-01	-608000000
1998-01-01	171000000
1999-01-01	-389000000
2000-01-01	-615000000
2001-01-01	-731000000
2002-01-01	-1087000000
2003-01-01	-1398000000
2004-01-01	-1753000000
2005-01-01	-2340000000
2006-01-01	-3126000000
2007-01-01	-2388000000
2008-01-01	109000000
2009-01-01	290000000
2010-01-01	-218000000
2011-01-01	-25000000
2012-01-01	543000000
2013-01-01	-411000000