Quarter	Billions of US Dollars
1987-01-01	0.09340
1987-04-01	0.29720
1987-07-01	0.03170
1988-01-01	-0.00070
1988-07-01	0.08060
1989-01-01	0.11660
1989-07-01	-0.01020
1989-10-01	-0.11500
1990-01-01	-0.15000
1990-04-01	-0.15000
1990-07-01	-0.03233
1990-10-01	-0.00200
1991-01-01	-0.12978
1991-10-01	-0.10560
1992-01-01	-0.09358
1992-04-01	-0.32729
1992-07-01	-0.05293
1993-04-01	-0.02500
1993-07-01	0.20803
1993-10-01	0.64622
1994-01-01	0.17033
1994-04-01	0.24592
1994-07-01	0.30232
1994-10-01	0.68819
1995-01-01	-0.51226
1995-04-01	0.02210
1995-07-01	0.62981
1995-10-01	0.33268
1996-01-01	0.84781
1996-04-01	0.52327
1996-07-01	-0.88572
1996-10-01	0.19912
1997-01-01	0.10397
1997-04-01	0.09608
1997-07-01	0.17769
1997-10-01	-0.20851
1998-01-01	0.42446
1998-04-01	0.85620
1998-07-01	-0.71387
1998-10-01	-1.06131
1999-01-01	-0.50773
1999-04-01	0.45961
1999-07-01	-0.48969
1999-10-01	0.11142
2000-01-01	0.37868
2000-04-01	0.37614
2000-07-01	-0.16309
2000-10-01	-0.07938
2001-01-01	-0.17953
2001-04-01	-0.61427
2001-07-01	-0.35749
2001-10-01	-0.14459
2002-01-01	0.02555
2002-04-01	-0.29032
2002-07-01	-0.08825
2002-10-01	-0.01738
2003-01-01	0.38402
2003-04-01	0.13697
2003-07-01	-0.04562
2003-10-01	-0.20217
2004-01-01	0.19814
2004-04-01	-0.23773
2004-07-01	-0.04565
2004-10-01	0.06082
2005-01-01	0.75095
2005-04-01	-0.40998
2005-07-01	0.01678
2005-10-01	0.00366
2006-01-01	0.08753
2006-04-01	-0.03609
2006-07-01	0.02128
2006-10-01	-0.39652
2007-01-01	0.63172
2007-04-01	0.88815
2007-07-01	0.50342
2007-10-01	-0.25320
2008-01-01	0.15673
2008-04-01	0.03720
2008-07-01	0.34458
2008-10-01	-0.55815
2009-01-01	0.04740
2009-04-01	0.08367
2009-07-01	-0.16251
2009-10-01	-0.29307
2010-01-01	-0.10415
2010-04-01	-0.23331
2010-07-01	0.19912
2010-10-01	0.10434
2011-01-01	-0.10031
2011-04-01	1.38904
2011-07-01	0.94554
2011-10-01	0.96800
2012-01-01	0.09105
2012-04-01	-0.46635
2012-07-01	0.54222
2012-10-01	-0.05288
2013-01-01	0.71118
2013-04-01	-0.96513
2013-07-01	-0.17876
2013-10-01	-0.24707
2014-01-01	-0.05702
2014-04-01	-0.77517
2014-07-01	-0.07324
2014-10-01	0.07771
2015-01-01	1.28708
2015-04-01	0.80872