Year US Dollars, Sum Over Component Sub-periods 1994-01-01 311000000 1995-01-01 894000000 1996-01-01 773000000 1997-01-01 410000000 1998-01-01 308000000 1999-01-01 1183000000 2000-01-01 807000000 2001-01-01 744000000 2002-01-01 1352000000 2003-01-01 2537000000 2004-01-01 3467000000 2005-01-01 4490000000 2006-01-01 6403000000 2007-01-01 8423000000 2008-01-01 10969000000 2009-01-01 8908000000 2010-01-01 9953000000 2011-01-01 16358000000