Quarter	Billions of US Dollars
1993-07-01	3.0119
1993-10-01	3.0232
1994-01-01	3.4072
1994-04-01	-0.0827
1994-07-01	0.0817
1994-10-01	0.3060
1995-01-01	-2.1936
1995-04-01	-0.0146
1995-07-01	0.4811
1995-10-01	1.1113
1996-01-01	0.9952
1996-04-01	2.7699
1996-07-01	1.2608
1996-10-01	1.8583
1997-01-01	0.9612
1997-04-01	4.0723
1997-07-01	5.5814
1997-10-01	-0.1038
1998-01-01	2.6097
1998-04-01	2.7149
1998-07-01	-0.4751
1998-10-01	-0.5805
1999-01-01	-1.1622
1999-04-01	2.5812
1999-07-01	0.2883
1999-10-01	-0.2963
2000-01-01	1.7355
2000-04-01	0.8904
2000-07-01	0.4539
2000-10-01	-2.5043
2001-01-01	1.3862
2001-04-01	-0.8549
2001-07-01	0.9418
2001-10-01	-1.0955
2002-01-01	-2.0391
2002-04-01	-1.2609
2002-07-01	-1.3119
2002-10-01	0.3900
2003-01-01	-1.3088
2003-04-01	-0.8190
2003-07-01	-1.7129
2003-10-01	2.2494
2004-01-01	-0.2629
2004-04-01	-3.3254
2004-07-01	-2.1003
2004-10-01	-0.5018
2005-01-01	1.6943
2005-04-01	-0.5311
2005-07-01	1.7781
2005-10-01	2.0518
2006-01-01	2.0191
2006-04-01	-0.2460
2006-07-01	1.2248
2006-10-01	2.5959
2007-01-01	2.1280
2007-04-01	8.4999
2007-07-01	-1.3068
2007-10-01	2.8129
2008-01-01	-1.2881
2008-04-01	-2.4227
2008-07-01	-0.6569
2008-10-01	-2.9705
2009-01-01	0.2244
2009-04-01	1.1164
2009-07-01	8.8256
2009-10-01	11.0715
2010-01-01	9.1536
2010-04-01	7.6226
2010-07-01	5.8027
2010-10-01	4.5629
2011-01-01	8.1777
2011-04-01	8.7600
2011-07-01	3.8198
2011-10-01	14.3038
2012-01-01	9.2812
2012-04-01	6.1032
2012-07-01	11.2395
2012-10-01	8.1388
2013-01-01	9.5849
2013-04-01	7.9536
2013-07-01	12.0025
2013-10-01	13.8904
2014-01-01	3.9703
2014-04-01	10.5546
2014-07-01	13.5445
2014-10-01	5.4423
2015-01-01	4.0896
2015-04-01	16.7041