Quarter	Billions of US Dollars
1993-07-01	0.6768
1993-10-01	0.4884
1994-01-01	0.8624
1994-04-01	1.2304
1994-07-01	1.0681
1994-10-01	0.8732
1995-01-01	1.5173
1995-04-01	1.5573
1995-07-01	1.4676
1995-10-01	1.0372
1996-01-01	2.0115
1996-04-01	2.0540
1996-07-01	3.5742
1996-10-01	3.0604
1997-01-01	3.8594
1997-04-01	5.6802
1997-07-01	5.2911
1997-10-01	4.4963
1998-01-01	3.9494
1998-04-01	2.7575
1998-07-01	3.8685
1998-10-01	3.8219
1999-01-01	4.8818
1999-04-01	3.7356
1999-07-01	4.6487
1999-10-01	4.4674
2000-01-01	6.0309
2000-04-01	6.6408
2000-07-01	5.2945
2000-10-01	7.3453
2001-01-01	6.2745
2001-04-01	10.0057
2001-07-01	5.5295
2001-10-01	7.8199
2002-01-01	6.3223
2002-04-01	6.5761
2002-07-01	6.8654
2002-10-01	7.3123
2003-01-01	9.0755
2003-04-01	8.0953
2003-07-01	7.1646
2003-10-01	8.8211
2004-01-01	11.7859
2004-04-01	9.5236
2004-07-01	8.8550
2004-10-01	10.3351
2005-01-01	12.7494
2005-04-01	12.2286
2005-07-01	11.5189
2005-10-01	11.9682
2006-01-01	13.9093
2006-04-01	16.1887
2006-07-01	17.9354
2006-10-01	21.2186
2007-01-01	24.6722
2007-04-01	21.7433
2007-07-01	31.5003
2007-10-01	18.5245
2008-01-01	30.6786
2008-04-01	30.9645
2008-07-01	22.8905
2008-10-01	11.7257
2009-01-01	12.4562
2009-04-01	12.9688
2009-07-01	12.3715
2009-10-01	5.6952
2010-01-01	7.3550
2010-04-01	7.8414
2010-07-01	6.5108
2010-10-01	8.3250
2011-01-01	9.9351
2011-04-01	10.9394
2011-07-01	12.8007
2011-10-01	10.9751
2012-01-01	11.9466
2012-04-01	7.5074
2012-07-01	7.3070
2012-10-01	3.5124
2013-01-01	5.8457
2013-04-01	9.3619
2013-07-01	7.1468
2013-10-01	7.8966
2014-01-01	10.9150
2014-04-01	11.8683
2014-07-01	15.0242
2014-10-01	13.5204
2015-01-01	11.8722
2015-04-01	9.2718