Year	US Dollars, Sum Over Component Sub-periods
1996-01-01	-9847000000
1997-01-01	-10664700000
1998-01-01	-13215100000
1999-01-01	-15115900000
2000-01-01	-15143700000
2001-01-01	-14912900000
2002-01-01	-13916500000
2003-01-01	-15184600000
2004-01-01	-20306200000
2005-01-01	-22651700000
2006-01-01	-23103100000
2007-01-01	-26292600000
2008-01-01	-33605000000
2009-01-01	-24720900000
2010-01-01	-25409300000
2011-01-01	-19752500000
2012-01-01	-11356400000
2013-01-01	-9398500000