Year US Dollars, Sum Over Component Sub-periods 1980-01-01 0 1981-01-01 0 1982-01-01 0 1983-01-01 0 1984-01-01 0 1985-01-01 0 1986-01-01 0 1987-01-01 0 1988-01-01 0 1989-01-01 0 1990-01-01 0 1991-01-01 0 1992-01-01 0 1993-01-01 0 1994-01-01 0 1995-01-01 -56000000 1996-01-01 92000000 1997-01-01 89000000 1998-01-01 208000000 1999-01-01 0 2000-01-01 0 2001-01-01 8000000 2002-01-01 -10000000 2003-01-01 14000000 2004-01-01 50000000 2005-01-01 35000000 2006-01-01 -89000000 2007-01-01 29000000 2008-01-01 -116000000 2009-01-01 230000000 2010-01-01 30000000 2011-01-01 -14000000 2012-01-01 302000000 2013-01-01 462000000 2014-01-01 425000000