Quarter	Billions of US Dollars
1993-07-01	0.7882
1993-10-01	1.3229
1994-01-01	2.4821
1994-04-01	1.5582
1994-07-01	2.3944
1994-10-01	3.3049
1995-01-01	3.3267
1995-04-01	1.6173
1995-07-01	4.9022
1995-10-01	2.1815
1996-01-01	1.7619
1996-04-01	5.1500
1996-07-01	5.7415
1996-10-01	2.3165
1997-01-01	3.0402
1997-04-01	1.7515
1997-07-01	3.7050
1997-10-01	0.3356
1998-01-01	0.9261
1998-04-01	1.1725
1998-07-01	0.8201
1998-10-01	0.5522
1999-01-01	1.7283
1999-04-01	3.0182
1999-07-01	1.7458
1999-10-01	1.6143
2000-01-01	1.1183
2000-04-01	0.9183
2000-07-01	1.3125
2000-10-01	1.2183
2001-01-01	2.3451
2001-04-01	1.5309
2001-07-01	1.8241
2001-10-01	2.4360
2002-01-01	2.4369
2002-04-01	2.6612
2002-07-01	4.2492
2002-10-01	5.9589
2003-01-01	7.3256
2003-04-01	7.0077
2003-07-01	7.3833
2003-10-01	8.7231
2004-01-01	14.1241
2004-04-01	8.5905
2004-07-01	8.1232
2004-10-01	8.9720
2005-01-01	13.8558
2005-04-01	7.8780
2005-07-01	11.0810
2005-10-01	12.0075
2006-01-01	20.3696
2006-04-01	10.0408
2006-07-01	10.7177
2006-10-01	14.0145
2007-01-01	19.0521
2007-04-01	15.3957
2007-07-01	6.0498
2007-10-01	8.7256
2008-01-01	17.0907
2008-04-01	16.5332
2008-07-01	10.6656
2008-10-01	7.5817
2009-01-01	5.5470
2009-04-01	9.2219
2009-07-01	10.6431
2009-10-01	21.4309
2010-01-01	23.7683
2010-04-01	12.9523
2010-07-01	20.3301
2010-10-01	11.4392
2011-01-01	24.3596
2011-04-01	20.8977
2011-07-01	16.0895
2011-10-01	6.3279
2012-01-01	20.8207
2012-04-01	12.3851
2012-07-01	18.2462
2012-10-01	12.9466
2013-01-01	18.2264
2013-04-01	13.5388
2013-07-01	13.7007
2013-10-01	8.5546
2014-01-01	15.4885
2014-04-01	17.3132
2014-07-01	21.9264
2014-10-01	9.9470
2015-01-01	15.2151
2015-04-01	9.8848