Year US Dollars, Sum Over Component Sub-periods 1982-01-01 394160000 1983-01-01 282480000 1984-01-01 321630000 1985-01-01 429660000 1986-01-01 1079540000 1987-01-01 645100000 1988-01-01 1670610000 1989-01-01 1808400000 1990-01-01 1971280000 1991-01-01 6355400000 1992-01-01 -41090000 1993-01-01 3844890000 1994-01-01 6349900000 1995-01-01 14447710000 1996-01-01 5436500000 1997-01-01 10966700000 1998-01-01 19875960000 1999-01-01 61135730000 2000-01-01 23437020000 2001-01-01 10904560000 2002-01-01 12293330000 2003-01-01 5401220000 2004-01-01 12219930000 2005-01-01 11624360000 2006-01-01 27550510000 2007-01-01 28850040000 2008-01-01 36854300000 2009-01-01 10034700000 2010-01-01 140590000 2011-01-01 12932280000 2012-01-01 16349100000 2013-01-01 10889180000