Quarter	US Dollars, Sum Over Component Sub-periods
1994-01-01	1130000000
1994-04-01	-847000000
1994-07-01	-994000000
1994-10-01	-1129000000
1995-01-01	921000000
1995-04-01	-925000000
1995-07-01	-2034000000
1995-10-01	-1334000000
1996-01-01	496000000
1996-04-01	-1675000000
1996-07-01	-1872000000
1996-10-01	-2383000000
1997-01-01	-1020000000
1997-04-01	-2406000000
1997-07-01	-2846000000
1997-10-01	-2420000000
1998-01-01	-1727000000
1998-04-01	-3290000000
1998-07-01	-4067000000
1998-10-01	-2706000000
1999-01-01	-1133000000
1999-04-01	-1874000000
1999-07-01	-2983000000
1999-10-01	-1727000000
2000-01-01	-992000000
2000-04-01	-1716000000
2000-07-01	-2803000000
2000-10-01	-1225000000
2001-01-01	-670000000
2001-04-01	-1072000000
2001-07-01	-2031000000
2001-10-01	-465000000
2002-01-01	-836000000
2002-04-01	-1187000000
2002-07-01	-2977000000
2002-10-01	-1583000000
2003-01-01	-1488000000
2003-04-01	-3178000000
2003-07-01	-4349000000
2003-10-01	-4156000000
2004-01-01	-2201000000
2004-04-01	-3492000000
2004-07-01	-3680000000
2004-10-01	-3398000000
2005-01-01	-1906000000
2005-04-01	-4840000000
2005-07-01	-7215000000
2005-10-01	-4988000000
2006-01-01	-3616000000
2006-04-01	-10577000000
2006-07-01	-7953000000
2006-10-01	-7286000000
2007-01-01	-2725000000
2007-04-01	-11654000000
2007-07-01	-8055000000
2007-10-01	-8318000000
2008-01-01	-6031000000
2008-04-01	-18315000000
2008-07-01	-15043000000
2008-10-01	-9770000000
2009-01-01	-4883000000
2009-04-01	-11907000000
2009-07-01	-10739000000
2009-10-01	-12754000000
2010-01-01	-7474000000
2010-04-01	-14774000000
2010-07-01	-12450000000
2010-10-01	-13917000000
2011-01-01	-9935000000
2011-04-01	-20595000000
2011-07-01	-14365000000
2011-10-01	-15312000000
2012-01-01	-10661000000
2012-04-01	-19903000000