Quarter	US Dollars, Sum Over Component Sub-periods
1979-01-01	1180000000
1979-04-01	1795000000
1979-07-01	1608000000
1979-10-01	3034000000
1980-01-01	2054000000
1980-04-01	1757000000
1980-07-01	2596000000
1980-10-01	3178000000
1981-01-01	2764000000
1981-04-01	2411000000
1981-07-01	2750000000
1981-10-01	4808000000
1982-01-01	3105000000
1982-04-01	3877000000
1982-07-01	2001000000
1982-10-01	3112000000
1983-01-01	1601000000
1983-04-01	1860000000
1983-07-01	1277000000
1983-10-01	2684000000
1984-01-01	1489000000
1984-04-01	1532000000
1984-07-01	1608000000
1984-10-01	1892000000
1985-01-01	505000000
1985-04-01	-904000000
1985-07-01	-165000000
1985-10-01	754000000
1986-01-01	-6000000
1986-04-01	213000000
1986-07-01	280000000
1986-10-01	938000000
1987-01-01	873000000
1987-04-01	674000000
1987-07-01	1333000000
1987-10-01	374000000
1988-01-01	-148000000
1988-04-01	-679000000
1988-07-01	-676000000
1988-10-01	-598000000
1989-01-01	-63000000
1989-04-01	-1846000000
1989-07-01	2019000000
1989-10-01	522000000
1990-01-01	771000000
1990-04-01	1285000000
1990-07-01	394000000
1990-10-01	2141000000
1991-01-01	-1072000000
1991-04-01	50000000
1991-07-01	-1501000000
1991-10-01	2686000000
1992-01-01	6240000000
1992-04-01	2783000000
1992-07-01	625000000
1992-10-01	263000000
1993-01-01	-1187000000
1993-04-01	1921000000
1993-07-01	3580000000
1993-10-01	6098000000
1994-01-01	5855000000
1994-04-01	4198000000
1994-07-01	-1237000000
1994-10-01	-298000000
1995-01-01	65000000
1995-04-01	5318000000
1995-07-01	16530000000
1995-10-01	6830000000
1996-01-01	8574000000
1996-04-01	8124000000
1996-07-01	4461000000
1996-10-01	12355000000
1997-01-01	5031000000
1997-04-01	8137000000
1997-07-01	10648000000
1997-10-01	1592000000
1998-01-01	23413000000
1998-04-01	13242000000
1998-07-01	-16798000000
1998-10-01	9525000000
1999-01-01	-5277000000
1999-04-01	15577000000
1999-07-01	5931000000
1999-10-01	750000000
2000-01-01	8309000000
2000-04-01	-5173000000
2000-07-01	7465000000
2000-10-01	8452000000
2001-01-01	7839000000
2001-04-01	9746000000
2001-07-01	7543000000
2001-10-01	1961000000
2002-01-01	4610000000
2002-04-01	9324000000
2002-07-01	-4631000000
2002-10-01	-1731000000
2003-01-01	4064000000
2003-04-01	4853000000
2003-07-01	787000000
2003-10-01	-5091000000
2004-01-01	1146000000
2004-04-01	-3459000000
2004-07-01	-5021000000
2004-10-01	-560000000
2005-01-01	7513000000
2005-04-01	-3545000000
2005-07-01	-8428000000
2005-10-01	-5666000000
2006-01-01	4066000000
2006-04-01	1651000000
2006-07-01	3009000000
2006-10-01	7427000000
2007-01-01	24535000000
2007-04-01	35802000000
2007-07-01	11715000000
2007-10-01	16278000000
2008-01-01	22186000000
2008-04-01	17639000000
2008-07-01	13576000000
2008-10-01	-25098000000
2009-01-01	3219000000
2009-04-01	14891000000
2009-07-01	20391000000
2009-10-01	31671000000
2010-01-01	19187000000
2010-04-01	23307000000
2010-07-01	29293000000
2010-10-01	27006000000
2011-01-01	43375000000
2011-04-01	25307000000
2011-07-01	25158000000
2011-10-01	16968000000
2012-01-01	23048000000
2012-04-01	22162000000
2012-07-01	13226000000
2012-10-01	13450000000
2013-01-01	30889000000
2013-04-01	19350000000
2013-07-01	11370000000
2013-10-01	11550000000
2014-01-01	28193000000
2014-04-01	23547000000
2014-07-01	27333000000
2014-10-01	18736000000