Quarter	Billions of US Dollars
1993-07-01	5.6289
1993-10-01	3.4267
1994-01-01	4.5080
1994-04-01	0.0399
1994-07-01	2.0897
1994-10-01	0.6371
1995-01-01	0.0381
1995-04-01	-1.1048
1995-07-01	-0.4863
1995-10-01	-0.3211
1996-01-01	0.2731
1996-04-01	-1.6494
1996-07-01	-2.3787
1996-10-01	-2.9734
1997-01-01	-0.2873
1997-04-01	-1.3494
1997-07-01	-1.5345
1997-10-01	-2.9813
1998-01-01	-3.9942
1998-04-01	0.2200
1998-07-01	-1.6118
1998-10-01	-2.2269
1999-01-01	-0.9310
1999-04-01	2.1245
1999-07-01	-1.2514
1999-10-01	-2.1482
2000-01-01	0.0914
2000-04-01	-0.1782
2000-07-01	-1.5470
2000-10-01	-1.3495
2001-01-01	-1.8544
2001-04-01	0.8152
2001-07-01	-1.1598
2001-10-01	-0.3752
2002-01-01	1.7196
2002-04-01	0.8486
2002-07-01	0.4644
2002-10-01	0.6035
2003-01-01	-0.3566
2003-04-01	7.4521
2003-07-01	4.2579
2003-10-01	2.5927
2004-01-01	6.2488
2004-04-01	3.9538
2004-07-01	6.9401
2004-10-01	8.9646
2005-01-01	9.6432
2005-04-01	4.7249
2005-07-01	7.6782
2005-10-01	5.7502
2006-01-01	8.7414
2006-04-01	7.2706
2006-07-01	6.5490
2006-10-01	9.8984
2007-01-01	14.2710
2007-04-01	16.8588
2007-07-01	4.6775
2007-10-01	9.7346
2008-01-01	8.3602
2008-04-01	18.0128
2008-07-01	-3.9016
2008-10-01	-4.5921
2009-01-01	2.5918
2009-04-01	9.1641
2009-07-01	-1.0152
2009-10-01	9.2997
2010-01-01	-0.5690
2010-04-01	13.4288
2010-07-01	1.4975
2010-10-01	11.6586
2011-01-01	-0.4123
2011-04-01	9.9742
2011-07-01	-9.4957
2011-10-01	1.2142
2012-01-01	4.7517
2012-04-01	-17.1737
2012-07-01	1.0873
2012-10-01	-20.4708
2013-01-01	0.5551
2013-04-01	-17.1447
2013-07-01	7.6500
2013-10-01	1.0507
2014-01-01	-7.7931
2014-04-01	-6.0015
2014-07-01	-12.9679
2014-10-01	-7.3044
2015-01-01	-8.7355
2015-04-01	-6.3137