Quarter	US Dollars, Sum Over Component Sub-periods
1980-01-01	-114000000
1980-04-01	-265000000
1980-07-01	-51000000
1980-10-01	-347000000
1981-01-01	-178000000
1981-04-01	-400000000
1981-07-01	-194000000
1981-10-01	-442000000
1982-01-01	-107000000
1982-04-01	-271000000
1982-07-01	-105000000
1982-10-01	-531000000
1983-01-01	-213000000
1983-04-01	-378000000
1983-07-01	-142000000
1983-10-01	-345000000
1984-01-01	-225000000
1984-04-01	-386000000
1984-07-01	-346000000
1984-10-01	-565000000
1985-01-01	-383000000
1985-04-01	-712000000
1985-07-01	-514000000
1985-10-01	-625000000
1986-01-01	-602000000
1986-04-01	-745000000
1986-07-01	-487000000
1986-10-01	-571000000
1987-01-01	-237000000
1987-04-01	-551000000
1987-07-01	-267000000
1987-10-01	-683000000
1988-01-01	-412000000
1988-04-01	-393000000
1988-07-01	-230000000
1988-10-01	-348000000
1989-01-01	-200000000
1989-04-01	-233000000
1989-07-01	-129000000
1989-10-01	-52000000
1990-01-01	43000000
1990-04-01	-131000000
1990-07-01	-64000000
1990-10-01	11000000
1991-01-01	11000000
1991-04-01	-77000000
1991-07-01	-41000000
1991-10-01	-103000000
1992-01-01	-35000000
1992-04-01	-215000000
1992-07-01	-123000000
1992-10-01	-50000000
1993-01-01	-20000000
1993-04-01	-210000000
1993-07-01	-103000000
1993-10-01	-117000000
1994-01-01	-162000000
1994-04-01	-84000000
1994-07-01	-79000000
1994-10-01	-225000000
1995-01-01	-133000000
1995-04-01	-566000000
1995-07-01	-356000000
1995-10-01	-329000000
1996-01-01	-371000000
1996-04-01	-662000000
1996-07-01	-243000000
1996-10-01	-602000000
1997-01-01	-385000000
1997-04-01	-892000000
1997-07-01	-584000000
1997-10-01	-652000000
1998-01-01	-1003000000
1998-04-01	-1455000000
1998-07-01	-1274000000
1998-10-01	-1885000000
1999-01-01	-1141000000
1999-04-01	-1777000000
1999-07-01	-926000000
1999-10-01	-1282000000
2000-01-01	-441000000
2000-04-01	-1216000000
2000-07-01	-451000000
2000-10-01	-275000000
2001-01-01	-382000000
2001-04-01	-883000000
2001-07-01	-127000000
2001-10-01	145000000
2002-01-01	51000000
2002-04-01	-856000000
2002-07-01	574000000
2002-10-01	630000000
2003-01-01	138000000
2003-04-01	-1042000000
2003-07-01	407000000
2003-10-01	750000000
2004-01-01	500000000
2004-04-01	-1177000000
2004-07-01	450000000
2004-10-01	1269000000
2005-01-01	121000000
2005-04-01	-2007000000
2005-07-01	-168000000
2005-10-01	237000000
2006-01-01	-604000000
2006-04-01	-1471000000
2006-07-01	1044000000
2006-10-01	1105000000
2007-01-01	-809000000
2007-04-01	-1891000000
2007-07-01	1635000000
2007-10-01	1200000000
2008-01-01	1613000000
2008-04-01	-887000000
2008-07-01	1137000000
2008-10-01	2572000000
2009-01-01	394000000
2009-04-01	-151000000
2009-07-01	949000000
2009-10-01	1085000000
2010-01-01	596000000
2010-04-01	-901000000
2010-07-01	1289000000
2010-10-01	33000000
2011-01-01	563000000
2011-04-01	-615000000
2011-07-01	1446000000
2011-10-01	1498000000
2012-01-01	1758000000
2012-04-01	1114000000
2012-07-01	1153000000
2012-10-01	1692000000
2013-01-01	1375000000
2013-04-01	62000000
2013-07-01	1572000000
2013-10-01	1794000000