Year US Dollars, Sum Over Component Sub-periods 1995-01-01 29604080000 1996-01-01 29274810000 1997-01-01 29143960000 1998-01-01 30768140000 1999-01-01 32577470000 2000-01-01 34337970000 2001-01-01 35393960000 2002-01-01 37748860000 2003-01-01 44644870000 2004-01-01 52676100000 2005-01-01 56130890000 2006-01-01 59476800000 2007-01-01 74967960000 2008-01-01 91628100000 2009-01-01 87942430000 2010-01-01 92768160000 2011-01-01 98242560000 2012-01-01 101481200000 2013-01-01 108379170000