Year	US Dollars, Sum Over Component Sub-periods
1998-01-01	-2800000000
1999-01-01	-5300000000
2000-01-01	-5600000000
2001-01-01	-5900000000
2002-01-01	-6800000000
2003-01-01	-8500000000
2004-01-01	-7800000000
2005-01-01	-9600000000
2006-01-01	-8800000000
2007-01-01	-7900000000
2008-01-01	-11800000000
2009-01-01	-29400000000
2010-01-01	-31200000000
2011-01-01	-61700000000
2012-01-01	-89800000000