Year	US Dollars, Sum Over Component Sub-periods
1984-01-01	-2942000000
1985-01-01	-2975000000
1986-01-01	-3081000000
1987-01-01	-3229000000
1988-01-01	-1777000000
1989-01-01	-4219000000
1990-01-01	-9555000000
1991-01-01	-7340000000
1992-01-01	-8076000000
1993-01-01	-14081000000
1994-01-01	-4167000000
1995-01-01	-13152000000
1996-01-01	-10264000000
1997-01-01	-15048000000
1998-01-01	-14038000000
1999-01-01	-9771000000
2000-01-01	-22057000000
2001-01-01	-3363000000
2002-01-01	-6390000000
2003-01-01	-13489000000
2004-01-01	-22736000000
2005-01-01	-33080000000
2006-01-01	-41058000000
2007-01-01	-46852000000
2008-01-01	-53021000000
2009-01-01	-24850000000
2010-01-01	-56413000000
2011-01-01	-89137000000
2012-01-01	-65331000000
2013-01-01	-80023000000