Year US Dollars, Sum Over Component Sub-periods 1994-01-01 18355000000 1995-01-01 25041000000 1996-01-01 27557000000 1997-01-01 30731000000 1998-01-01 32467000000 1999-01-01 30060000000 2000-01-01 35902000000 2001-01-01 41663000000 2002-01-01 46742000000 2003-01-01 61007000000 2004-01-01 81862000000 2005-01-01 96395000000 2006-01-01 117468000000 2007-01-01 145337000000 2008-01-01 178427000000 2009-01-01 142085000000 2010-01-01 165709000000 2011-01-01 195203000000 2012-01-01 190826000000 2013-01-01 207233000000