Year	US Dollars, Sum Over Component Sub-periods
1998-01-01	-16600000000
1999-01-01	-14500000000
2000-01-01	-14700000000
2001-01-01	-19200000000
2002-01-01	-14900000000
2003-01-01	-10200000000
2004-01-01	-5100000000
2005-01-01	-16100000000
2006-01-01	-5100000000
2007-01-01	8000000000
2008-01-01	28600000000
2009-01-01	-8500000000
2010-01-01	-25900000000
2011-01-01	-70200000000
2012-01-01	-42100000000