Year	US Dollars, Sum Over Component Sub-periods
1994-01-01	-10064000000
1995-01-01	-568000000
1996-01-01	2849000000
1997-01-01	4369000000
1998-01-01	7357000000
1999-01-01	10303000000
2000-01-01	9604000000
2001-01-01	3609000000
2002-01-01	6545000000
2003-01-01	7491000000
2004-01-01	7207000000
2005-01-01	7045000000
2006-01-01	10781000000
2007-01-01	25030000000
2008-01-01	41003000000
2009-01-01	20160000000
2010-01-01	25872000000
2011-01-01	25671000000
2012-01-01	11373000000
2013-01-01	3318000000