Quarter	Billions of US Dollars
1993-07-01	0.7311
1993-10-01	0.8012
1994-01-01	0.9427
1994-04-01	0.9510
1994-07-01	0.9674
1994-10-01	1.0343
1995-01-01	1.0126
1995-04-01	0.8724
1995-07-01	0.7715
1995-10-01	0.7641
1996-01-01	0.7384
1996-04-01	0.6405
1996-07-01	0.6523
1996-10-01	0.5127
1997-01-01	0.3401
1997-04-01	0.3228
1997-07-01	0.3343
1997-10-01	0.3032
1998-01-01	0.3195
1998-04-01	0.3005
1998-07-01	0.2349
1998-10-01	0.2464
1999-01-01	0.2347
1999-04-01	0.2141
1999-07-01	0.2026
1999-10-01	0.2037
2000-01-01	0.2021
2000-04-01	0.1390
2000-07-01	0.1330
2000-10-01	0.5155
2001-01-01	0.4616
2001-04-01	0.4709
2001-07-01	0.4603
2001-10-01	0.4727
2002-01-01	0.7531
2002-04-01	0.9539
2002-07-01	0.8616
2002-10-01	0.8812
2003-01-01	0.9043
2003-04-01	0.9525
2003-07-01	1.2980
2003-10-01	2.4821
2004-01-01	4.6506
2004-04-01	5.4329
2004-07-01	5.5932
2004-10-01	6.6362
2005-01-01	7.1117
2005-04-01	7.7061
2005-07-01	7.6268
2005-10-01	7.5829
2006-01-01	7.1054
2006-04-01	8.6104
2006-07-01	8.6184
2006-10-01	10.3568
2007-01-01	11.6916
2007-04-01	18.2786
2007-07-01	21.8425
2007-10-01	24.2268
2008-01-01	27.3892
2008-04-01	33.4216
2008-07-01	32.6955
2008-10-01	34.2335
2009-01-01	30.3311
2009-04-01	32.9050
2009-07-01	35.4919
2009-10-01	37.5499
2010-01-01	38.6161
2010-04-01	37.1501
2010-07-01	41.2718
2010-10-01	42.0743
2011-01-01	43.8127
2011-04-01	42.9032
2011-07-01	42.0468
2011-10-01	44.3610
2012-01-01	44.5200
2012-04-01	41.5305
2012-07-01	42.1747
2012-10-01	39.7685
2013-01-01	39.4707
2013-04-01	37.3523
2013-07-01	37.4540
2013-10-01	36.5495
2014-01-01	37.5791
2014-04-01	37.3726
2014-07-01	35.4115
2014-10-01	33.2905
2015-01-01	31.4882
2015-04-01	32.2689