Quarter	Billions of US Dollars
1993-07-01	2.1043
1993-10-01	2.9650
1994-01-01	3.4838
1994-04-01	2.8472
1994-07-01	5.8250
1994-10-01	1.3557
1995-01-01	2.0649
1995-04-01	3.8694
1995-07-01	5.8614
1995-10-01	4.3270
1996-01-01	3.7626
1996-04-01	1.6400
1996-07-01	4.5526
1996-10-01	4.7592
1997-01-01	7.0200
1997-04-01	3.1091
1997-07-01	5.4111
1997-10-01	1.2769
1998-01-01	2.2562
1998-04-01	1.2749
1998-07-01	2.7786
1998-10-01	0.0936
1999-01-01	0.5054
1999-04-01	1.2191
1999-07-01	-1.1047
1999-10-01	0.8163
2000-01-01	-0.9197
2000-04-01	-0.2824
2000-07-01	2.0691
2000-10-01	-1.7983
2001-01-01	5.5102
2001-04-01	8.9566
2001-07-01	4.2184
2001-10-01	6.0985
2002-01-01	-3.1876
2002-04-01	1.7376
2002-07-01	-1.5298
2002-10-01	-0.8270
2003-01-01	-1.3114
2003-04-01	-1.4216
2003-07-01	-5.1524
2003-10-01	-0.4586
2004-01-01	-1.1358
2004-04-01	1.6211
2004-07-01	1.1893
2004-10-01	-1.8545
2005-01-01	0.9761
2005-04-01	-4.1248
2005-07-01	0.4036
2005-10-01	-3.3094
2006-01-01	-2.2450
2006-04-01	-0.7395
2006-07-01	2.3296
2006-10-01	1.8318
2007-01-01	1.2704
2007-04-01	8.2072
2007-07-01	12.7205
2007-10-01	6.8523
2008-01-01	8.3337
2008-04-01	8.5391
2008-07-01	3.9390
2008-10-01	-3.9248
2009-01-01	7.4687
2009-04-01	0.9872
2009-07-01	-2.9684
2009-10-01	-1.7713
2010-01-01	-4.2770
2010-04-01	-6.6442
2010-07-01	2.8595
2010-10-01	0.2144
2011-01-01	-1.7333
2011-04-01	-3.1423
2011-07-01	-3.1229
2011-10-01	-4.0356
2012-01-01	-8.4091
2012-04-01	-6.6259
2012-07-01	-7.8081
2012-10-01	-3.2347
2013-01-01	-9.8076
2013-04-01	-11.1104
2013-07-01	-7.1708
2013-10-01	-2.5720
2014-01-01	-3.0536
2014-04-01	-3.6109
2014-07-01	-0.9749
2014-10-01	-2.4406
2015-01-01	-1.1601
2015-04-01	-0.7269