Quarter	Billions of US Dollars
1993-07-01	5.7513
1993-10-01	-0.8770
1994-01-01	0.5947
1994-04-01	-0.2901
1994-07-01	1.1949
1994-10-01	0.6860
1995-01-01	0.1084
1995-04-01	-0.8865
1995-07-01	2.6774
1995-10-01	0.5573
1996-01-01	1.6412
1996-04-01	-0.2109
1996-07-01	0.9826
1996-10-01	-1.6947
1997-01-01	3.0322
1997-04-01	0.2783
1997-07-01	1.9415
1997-10-01	2.1059
1998-01-01	2.9990
1998-04-01	2.7849
1998-07-01	0.5305
1998-10-01	0.0380
1999-01-01	2.5696
1999-04-01	2.1620
1999-07-01	8.6641
1999-10-01	2.4849
2000-01-01	5.8373
2000-04-01	5.0278
2000-07-01	3.6358
2000-10-01	2.5706
2001-01-01	-2.0726
2001-04-01	-5.0117
2001-07-01	-3.9459
2001-10-01	3.3107
2002-01-01	3.6546
2002-04-01	0.9912
2002-07-01	14.1290
2002-10-01	-10.3557
2003-01-01	9.4416
2003-04-01	8.1253
2003-07-01	2.4285
2003-10-01	3.0998
2004-01-01	4.4576
2004-04-01	-0.4587
2004-07-01	9.6997
2004-10-01	3.1402
2005-01-01	-0.7603
2005-04-01	7.1194
2005-07-01	16.6210
2005-10-01	-8.2370
2006-01-01	11.2258
2006-04-01	-8.0020
2006-07-01	15.3257
2006-10-01	17.2312
2007-01-01	17.6973
2007-04-01	-1.5130
2007-07-01	-5.5894
2007-10-01	-1.6865
2008-01-01	19.1962
2008-04-01	1.0975
2008-07-01	-9.5572
2008-10-01	18.8607
2009-01-01	-32.0697
2009-04-01	-22.8061
2009-07-01	12.6407
2009-10-01	-40.2466
2010-01-01	15.2069
2010-04-01	-7.9955
2010-07-01	4.2178
2010-10-01	-25.3689
2011-01-01	0.9483
2011-04-01	0.6220
2011-07-01	-4.6263
2011-10-01	-8.4843
2012-01-01	9.0810
2012-04-01	-7.2658
2012-07-01	-5.1124
2012-10-01	-16.9720
2013-01-01	1.2250
2013-04-01	-11.7589
2013-07-01	4.7598
2013-10-01	-0.3080
2014-01-01	0.4955
2014-04-01	-1.0253
2014-07-01	3.9066
2014-10-01	1.2479
2015-01-01	3.1587
2015-04-01	-2.6174