Quarter	Billions of US Dollars
1993-07-01	1.13164
1993-10-01	1.06352
1994-01-01	1.30995
1994-04-01	1.21835
1994-07-01	1.31560
1994-10-01	1.37871
1995-01-01	1.64265
1995-04-01	1.68379
1995-07-01	1.61364
1995-10-01	1.58887
1996-01-01	1.66787
1996-04-01	1.62474
1996-07-01	1.71891
1996-10-01	1.66827
1997-01-01	1.60573
1997-04-01	1.54137
1997-07-01	1.49357
1997-10-01	1.47055
1998-01-01	1.40609
1998-04-01	1.38502
1998-07-01	1.36904
1998-10-01	1.39765
1999-01-01	1.33755
1999-04-01	1.30594
1999-07-01	1.44217
1999-10-01	1.36517
2000-01-01	1.35341
2000-04-01	1.34640
2000-07-01	1.38438
2000-10-01	1.44051
2001-01-01	1.45116
2001-04-01	1.43862
2001-07-01	1.52350
2001-10-01	1.72741
2002-01-01	1.54105
2002-04-01	1.81593
2002-07-01	2.07463
2002-10-01	2.08365
2003-01-01	2.06476
2003-04-01	2.08376
2003-07-01	2.10104
2003-10-01	2.17657
2004-01-01	2.21850
2004-04-01	2.14805
2004-07-01	2.16954
2004-10-01	2.22620
2005-01-01	2.07794
2005-04-01	1.86221
2005-07-01	1.64695
2005-10-01	1.43136
2006-01-01	1.46245
2006-04-01	1.32292
2006-07-01	1.26954
2006-10-01	2.56364
2007-01-01	2.38803
2007-04-01	2.35342
2007-07-01	2.45869
2007-10-01	2.54186
2008-01-01	2.71052
2008-04-01	2.46671
2008-07-01	2.73556
2008-10-01	2.19211
2009-01-01	2.10614
2009-04-01	2.22844
2009-07-01	2.07871
2009-10-01	2.04934
2010-01-01	1.93032
2010-04-01	2.27163
2010-07-01	2.50171
2010-10-01	2.45370
2011-01-01	2.59456
2011-04-01	4.63494
2011-07-01	4.47681
2011-10-01	3.08936
2012-01-01	3.11817
2012-04-01	3.75230
2012-07-01	3.76771
2012-10-01	3.77708
2013-01-01	3.75949
2013-04-01	3.77124
2013-07-01	3.79069
2013-10-01	3.80311
2014-01-01	3.60352
2014-04-01	3.59947
2014-07-01	4.49747
2014-10-01	4.44486
2015-01-01	4.28330
2015-04-01	4.14060