Quarter	Billions of US Dollars
1993-07-01	9.6986
1993-10-01	-1.0942
1994-01-01	0.1055
1994-04-01	-1.9427
1994-07-01	0.1251
1994-10-01	1.4670
1995-01-01	-0.2727
1995-04-01	-0.8005
1995-07-01	-2.1751
1995-10-01	-0.2222
1996-01-01	-1.0117
1996-04-01	1.3403
1996-07-01	-0.0526
1996-10-01	1.5436
1997-01-01	-1.2654
1997-04-01	-0.5934
1997-07-01	-0.4091
1997-10-01	-0.0297
1998-01-01	-1.9239
1998-04-01	0.4262
1998-07-01	0.3468
1998-10-01	-0.9438
1999-01-01	0.3341
1999-04-01	-0.7878
1999-07-01	-0.4423
1999-10-01	0.5865
2000-01-01	4.2973
2000-04-01	2.7467
2000-07-01	-5.6734
2000-10-01	-1.6052
2001-01-01	2.4666
2001-04-01	-1.5050
2001-07-01	2.8141
2001-10-01	2.9631
2002-01-01	-0.8759
2002-04-01	-0.2078
2002-07-01	-0.1365
2002-10-01	-1.5516
2003-01-01	4.1573
2003-04-01	2.6617
2003-07-01	-4.3761
2003-10-01	-6.7744
2004-01-01	2.9496
2004-04-01	-0.4725
2004-07-01	-0.9102
2004-10-01	-3.9760
2005-01-01	2.8011
2005-04-01	3.9190
2005-07-01	-6.0648
2005-10-01	-0.7468
2006-01-01	5.5817
2006-04-01	6.2892
2006-07-01	-9.0797
2006-10-01	-4.1401
2007-01-01	7.0608
2007-04-01	19.8562
2007-07-01	10.3866
2007-10-01	-33.0187
2008-01-01	13.9419
2008-04-01	9.2181
2008-07-01	14.9792
2008-10-01	23.7216
2009-01-01	-0.5697
2009-04-01	-5.3280
2009-07-01	-6.3932
2009-10-01	-24.8517
2010-01-01	4.0737
2010-04-01	-8.3184
2010-07-01	12.5711
2010-10-01	-11.9271
2011-01-01	0.8701
2011-04-01	-4.8245
2011-07-01	5.2886
2011-10-01	1.9413
2012-01-01	-1.5377
2012-04-01	-4.6024
2012-07-01	-0.6710
2012-10-01	22.8078
2013-01-01	-6.0683
2013-04-01	-15.2650
2013-07-01	11.7596
2013-10-01	-14.2769
2014-01-01	-5.5278
2014-04-01	16.0556
2014-07-01	-1.4750
2014-10-01	-3.8737
2015-01-01	-4.7438
2015-04-01	-5.6294