Quarter	Billions of US Dollars
1993-07-01	1.92328
1993-10-01	0.67726
1994-01-01	-0.41244
1994-04-01	0.18059
1994-07-01	0.10092
1994-10-01	-0.50218
1995-01-01	-1.13334
1995-04-01	0.06721
1995-07-01	0.06698
1995-10-01	0.69427
1996-01-01	-0.51723
1996-04-01	-0.14939
1996-07-01	-0.62548
1996-10-01	0.16769
1997-01-01	-0.45479
1997-04-01	-0.04198
1997-07-01	0.14124
1997-10-01	-0.12402
1998-01-01	-0.40658
1998-04-01	-0.05926
1998-07-01	-0.09870
1998-10-01	0.00412
1999-01-01	0.55429
1999-04-01	1.11395
1999-07-01	-0.18226
1999-10-01	-0.69449
2000-01-01	-0.07969
2000-04-01	2.57031
2000-07-01	-2.86846
2000-10-01	-0.24792
2001-01-01	0.78119
2001-04-01	0.15962
2001-07-01	-0.31644
2001-10-01	-0.45767
2002-01-01	-0.19550
2002-04-01	1.30758
2002-07-01	0.12460
2002-10-01	-1.57396
2003-01-01	1.92964
2003-04-01	2.70344
2003-07-01	-0.59517
2003-10-01	-2.55363
2004-01-01	1.58420
2004-04-01	-0.46066
2004-07-01	-1.23564
2004-10-01	-1.55423
2005-01-01	0.54407
2005-04-01	-0.31188
2005-07-01	-0.11378
2005-10-01	-0.11668
2006-01-01	0.39304
2006-04-01	0.59430
2006-07-01	-0.49667
2006-10-01	-0.53566
2007-01-01	0.18224
2007-04-01	1.19174
2007-07-01	-0.10645
2007-10-01	-1.07025
2008-01-01	4.71432
2008-04-01	-2.70938
2008-07-01	0.52563
2008-10-01	-2.53472
2009-01-01	3.25647
2009-04-01	1.33710
2009-07-01	-3.60940
2009-10-01	-1.43494
2010-04-01	1.37328
2010-07-01	4.15390
2010-10-01	-5.70270
2011-01-01	2.59233
2011-04-01	-2.39426
2011-07-01	3.38442
2011-10-01	-3.54179
2012-01-01	2.15493
2012-04-01	0.41524
2012-07-01	1.10064
2012-10-01	-0.83404
2013-01-01	-0.66007
2013-04-01	-0.99294
2013-07-01	0.07285
2013-10-01	-0.85745
2014-01-01	0.00329
2014-04-01	-0.01544
2014-07-01	-0.01967
2014-10-01	-0.23500
2015-01-01	-0.05720
2015-04-01	0.08286