Year US Dollars, Sum Over Component Sub-periods 1994-01-01 0 1995-01-01 0 1996-01-01 -3000000 1997-01-01 -12000000 1998-01-01 0 1999-01-01 569000000 2000-01-01 269000000 2001-01-01 -336000000 2002-01-01 -898000000 2003-01-01 -870000000 2004-01-01 200000000 2005-01-01 193000000 2006-01-01 -689000000 2007-01-01 -2046000000 2008-01-01 -993000000 2009-01-01 -1692000000 2010-01-01 -787000000 2011-01-01 -183000000 2012-01-01 2874000000 2013-01-01 507000000