Year	US Dollars, Sum Over Component Sub-periods
1998-01-01	-18700000000
1999-01-01	-17800000000
2000-01-01	-11900000000
2001-01-01	-4900000000
2002-01-01	7800000000
2003-01-01	8200000000
2004-01-01	13000000000
2005-01-01	22900000000
2006-01-01	3600000000
2007-01-01	13300000000
2008-01-01	18800000000
2009-01-01	-41400000000
2010-01-01	-52900000000
2011-01-01	-13700000000
2012-01-01	-79700000000