Quarter	Billions of US Dollars
1993-07-01	1.06358
1993-10-01	1.28970
1994-01-01	1.39906
1994-04-01	1.28055
1994-07-01	1.11486
1994-10-01	1.00740
1995-01-01	1.44990
1995-04-01	1.89694
1995-07-01	1.93683
1995-10-01	2.24081
1996-01-01	1.38755
1996-04-01	1.26513
1996-07-01	1.29550
1996-10-01	1.28146
1997-01-01	1.63381
1997-04-01	1.44578
1997-07-01	0.91267
1997-10-01	0.98759
1998-01-01	1.50479
1998-04-01	1.80943
1998-07-01	1.84747
1998-10-01	1.80656
1999-01-01	1.99050
1999-04-01	2.59593
1999-07-01	2.25556
1999-10-01	2.56990
2000-01-01	2.85431
2000-04-01	1.86483
2000-07-01	2.37089
2000-10-01	2.77322
2001-01-01	2.15797
2001-04-01	2.59424
2001-07-01	2.05813
2001-10-01	1.99693
2002-01-01	1.80915
2002-04-01	2.34637
2002-07-01	2.30659
2002-10-01	2.85965
2003-01-01	2.62461
2003-04-01	2.20020
2003-07-01	2.37095
2003-10-01	2.31262
2004-01-01	3.79855
2004-04-01	3.30998
2004-07-01	2.99891
2004-10-01	2.97476
2005-01-01	3.35443
2005-04-01	6.36820
2005-07-01	6.02395
2005-10-01	6.51821
2006-01-01	5.93122
2006-04-01	3.13525
2006-07-01	3.16143
2006-10-01	2.99772
2007-01-01	3.33297
2007-04-01	4.93141
2007-07-01	4.94940
2007-10-01	5.78395
2008-01-01	3.59904
2008-04-01	3.23392
2008-07-01	3.39771
2008-10-01	3.04259
2009-01-01	3.35822
2009-04-01	4.27206
2009-07-01	5.28216
2009-10-01	5.67816
2010-01-01	5.83781
2010-04-01	3.34293
2010-07-01	2.75445
2010-10-01	1.98879
2011-01-01	1.62911
2011-04-01	5.97060
2011-07-01	5.90184
2011-10-01	6.94030
2012-01-01	8.04394
2012-04-01	6.68736
2012-07-01	7.34420
2012-10-01	7.15464
2013-01-01	8.88724
2013-04-01	7.94456
2013-07-01	7.62628
2013-10-01	7.79034
2014-01-01	6.10586
2014-04-01	6.18027
2014-07-01	5.82947
2014-10-01	5.32996
2015-01-01	6.12123
2015-04-01	6.89373