Year	US Dollars, Sum Over Component Sub-periods
1980-01-01	148000000
1981-01-01	93000000
1982-01-01	-102000000
1983-01-01	862000000
1984-01-01	-101000000
1985-01-01	-8000000
1986-01-01	36000000
1987-01-01	-49000000
1988-01-01	4006000000
1989-01-01	703000000
1990-01-01	-171000000
1991-01-01	221000000
1992-01-01	-252000000
1993-01-01	2137000000
1994-01-01	2716000000
1995-01-01	1723000000
1996-01-01	3774000000
1997-01-01	4128000000
1998-01-01	2388000000
1999-01-01	2439000000
2000-01-01	4646000000
2001-01-01	-1100000000
2002-01-01	1602000000
2003-01-01	1314000000
2004-01-01	7063000000
2005-01-01	2755000000
2006-01-01	9084000000
2007-01-01	1636000000
2008-01-01	996000000
2009-01-01	2389000000
2010-01-01	8985000000
2011-01-01	-5392000000
2012-01-01	-3331000000
2013-01-01	1755000000
2014-01-01	9753000000