Quarter	Billions of US Dollars
1993-07-01	1.0808
1993-10-01	0.9732
1994-01-01	0.8313
1994-04-01	0.6211
1994-07-01	0.6165
1994-10-01	0.4969
1995-01-01	1.3826
1995-04-01	1.5076
1995-07-01	1.5251
1995-10-01	1.3778
1996-01-01	0.8957
1996-04-01	0.9890
1996-07-01	0.7568
1996-10-01	0.9422
1997-01-01	1.1867
1997-04-01	1.1899
1997-07-01	1.0465
1997-10-01	0.3357
1998-01-01	0.3235
1998-04-01	0.3397
1998-07-01	0.3832
1998-10-01	0.3661
1999-01-01	0.3112
1999-04-01	0.4546
1999-07-01	1.0371
1999-10-01	1.7767
2000-01-01	0.8988
2000-04-01	0.6894
2000-07-01	1.0190
2000-10-01	0.3725
2001-01-01	0.5586
2001-04-01	0.4711
2001-07-01	0.6442
2001-10-01	0.5524
2002-01-01	0.4657
2002-04-01	0.4172
2002-07-01	0.3569
2002-10-01	0.6543
2003-01-01	0.6393
2003-04-01	0.6453
2003-07-01	0.6017
2003-10-01	0.8399
2004-01-01	0.5206
2004-04-01	0.7451
2004-07-01	0.5028
2004-10-01	0.8472
2005-01-01	0.7010
2005-04-01	0.9837
2005-07-01	0.7710
2005-10-01	1.6085
2006-01-01	1.7682
2006-04-01	3.3509
2006-07-01	3.6124
2006-10-01	2.9544
2007-01-01	7.5406
2007-04-01	5.3689
2007-07-01	8.5075
2007-10-01	11.0419
2008-01-01	11.7456
2008-04-01	24.0624
2008-07-01	36.1920
2008-10-01	20.6184
2009-01-01	33.9021
2009-04-01	36.4216
2009-07-01	27.6075
2009-10-01	31.0166
2010-01-01	27.3396
2010-04-01	17.7729
2010-07-01	25.4289
2010-10-01	22.0688
2011-01-01	22.9667
2011-04-01	18.3466
2011-07-01	10.5414
2011-10-01	8.5580
2012-01-01	15.5071
2012-04-01	7.3748
2012-07-01	4.3118
2012-10-01	3.9113
2013-01-01	4.0020
2013-04-01	5.5033
2013-07-01	3.9626
2013-10-01	3.3564
2014-01-01	6.6762
2014-04-01	5.3580
2014-07-01	5.9112
2014-10-01	7.3352
2015-01-01	9.3263
2015-04-01	3.3121