Quarter	US Dollars, Sum Over Component Sub-periods
1997-01-01	-3072000000
1997-04-01	-2687000000
1997-07-01	-2530000000
1997-10-01	-3031000000
1998-01-01	-3244000000
1998-04-01	-2874000000
1998-07-01	-3295000000
1998-10-01	-4307000000
1999-01-01	-2823000000
1999-04-01	-3360000000
1999-07-01	-3883000000
1999-10-01	-4313000000
2000-01-01	-3110000000
2000-04-01	-3498000000
2000-07-01	-2693000000
2000-10-01	-3006000000
2001-01-01	-1997000000
2001-04-01	-2145000000
2001-07-01	-1575000000
2001-10-01	-1944000000
2002-01-01	-1809000000
2002-04-01	-1949000000
2002-07-01	-1419000000
2002-10-01	-2072000000
2003-01-01	-1640000000
2003-04-01	-1235000000
2003-07-01	-1299000000
2003-10-01	-1551000000
2004-01-01	-1138000000
2004-04-01	-2109000000
2004-07-01	-1517000000
2004-10-01	-1197000000
2005-01-01	-453000000
2005-04-01	-861000000
2005-07-01	-830000000
2005-10-01	-951000000
2006-01-01	-1068000000
2006-04-01	-1589000000
2006-07-01	-2117000000
2006-10-01	-2598000000
2007-01-01	-3493000000
2007-04-01	-4611000000
2007-07-01	-4513000000
2007-10-01	-6449000000
2008-01-01	-6019000000
2008-04-01	-8382000000
2008-07-01	-8498000000
2008-10-01	-7760000000
2009-01-01	-1504000000
2009-04-01	-1508000000
2009-07-01	-2194000000
2009-10-01	-2411000000
2010-01-01	-1994000000
2010-04-01	-2069000000
2010-07-01	-3196000000
2010-10-01	-4551000000
2011-01-01	-2666000000
2011-04-01	-4547000000
2011-07-01	-3309000000
2011-10-01	-3520000000
2012-01-01	-2709000000
2012-04-01	-2104000000
2012-07-01	-523000000
2012-10-01	-1362000000
2013-01-01	-183000000
2013-04-01	1571000000
2013-07-01	1449000000
2013-10-01	205000000
2014-01-01	1588000000