Quarter	US Dollars, Sum Over Component Sub-periods
1988-01-01	-5450800000
1988-04-01	371600000
1988-07-01	-121300000
1988-10-01	-1949000000
1989-01-01	-8395900000
1989-04-01	-1962100000
1989-07-01	797200000
1989-10-01	-1935000000
1990-01-01	-9670000000
1990-04-01	-2455900000
1990-07-01	338800000
1990-10-01	-5161300000
1991-01-01	-8897200000
1991-04-01	-6016000000
1991-07-01	-4263200000
1991-10-01	-5854300000
1992-01-01	-11028200000
1992-04-01	-6571800000
1992-07-01	-6323400000
1992-10-01	-6536500000
1993-01-01	-3429700000
1993-04-01	1941800000
1993-07-01	4328900000
1993-10-01	5326200000
1994-01-01	1644400000
1994-04-01	3828300000
1994-07-01	4171700000
1994-10-01	4363100000
1995-01-01	2705300000
1995-04-01	6342300000
1995-07-01	7994100000
1995-10-01	6166100000
1996-01-01	5695300000
1996-04-01	10573400000
1996-07-01	14383200000
1996-10-01	9661400000
1997-01-01	6357900000
1997-04-01	6988900000
1997-07-01	11038400000
1997-10-01	9170900000
1998-01-01	46500000
1998-04-01	7284600000
1998-07-01	9670800000
1998-10-01	2747400000
1999-01-01	323300000
1999-04-01	3084700000
1999-07-01	5272700000
1999-10-01	-561500000
2000-01-01	-1020800000
2000-04-01	-3309700000
2000-07-01	1379000000
2000-10-01	-2863200000
2001-01-01	-1622900000
2001-04-01	-2347900000
2001-07-01	1499400000
2001-10-01	1837000000
2002-01-01	-1761100000
2002-04-01	-4871200000
2002-07-01	2014600000
2002-10-01	-4785200000
2003-01-01	-8181300000
2003-04-01	-9310900000
2003-07-01	1885500000
2003-10-01	-3800500000
2004-01-01	-5877000000
2004-04-01	-6297400000
2004-07-01	4043400000
2004-10-01	-8312600000
2005-01-01	-11387900000
2005-04-01	-9263900000
2005-07-01	-981700000
2005-10-01	-8067400000
2006-01-01	-15489700000
2006-04-01	-13128200000
2006-07-01	-7742900000
2006-10-01	-11530500000
2007-01-01	-16955300000
2007-04-01	-12650400000
2007-07-01	-6185600000
2007-10-01	-15792000000
2008-01-01	-25418600000
2008-04-01	-9248900000
2008-07-01	-13768500000
2008-10-01	-17274800000
2009-01-01	-19750400000
2009-04-01	-8398500000
2009-07-01	-6042200000
2009-10-01	-5104300000
2010-01-01	-24429100000
2010-04-01	-15270000000
2010-07-01	-13569000000
2010-10-01	-16822800000
2011-01-01	-30263600000
2011-04-01	-17163200000
2011-07-01	-12123600000
2011-10-01	-6274400000
2012-01-01	-16381600000
2012-04-01	984700000
2012-07-01	1779900000
2012-10-01	8096000000
2013-01-01	-7832500000
2013-04-01	6177900000
2013-07-01	8050000000
2013-10-01	14472300000
2014-01-01	-48800000