Quarter	Billions of US Dollars
1993-07-01	5.5978
1993-10-01	4.7538
1994-01-01	4.9199
1994-04-01	4.2585
1994-07-01	4.6164
1994-10-01	4.8217
1995-01-01	5.0983
1995-04-01	5.5636
1995-07-01	6.8440
1995-10-01	6.1529
1996-01-01	5.1197
1996-04-01	4.0189
1996-07-01	3.3794
1996-10-01	3.9153
1997-01-01	3.6960
1997-04-01	3.6997
1997-07-01	3.2218
1997-10-01	4.4164
1998-01-01	4.0802
1998-04-01	3.5121
1998-07-01	3.7229
1998-10-01	3.8068
1999-01-01	3.6509
1999-04-01	3.8696
1999-07-01	5.5863
1999-10-01	4.8573
2000-01-01	3.4030
2000-04-01	2.7478
2000-07-01	1.9260
2000-10-01	2.4555
2001-01-01	2.5625
2001-04-01	2.7172
2001-07-01	2.7632
2001-10-01	2.8190
2002-01-01	2.5541
2002-04-01	2.2924
2002-07-01	3.0644
2002-10-01	4.3128
2003-01-01	4.2270
2003-04-01	2.9710
2003-07-01	3.7915
2003-10-01	3.5632
2004-01-01	4.9281
2004-04-01	6.2046
2004-07-01	4.3215
2004-10-01	8.4091
2005-01-01	8.0507
2005-04-01	6.5797
2005-07-01	7.2112
2005-10-01	7.6389
2006-01-01	10.1103
2006-04-01	10.2179
2006-07-01	8.9977
2006-10-01	8.8570
2007-01-01	11.5634
2007-04-01	13.2257
2007-07-01	12.9139
2007-10-01	10.8340
2008-01-01	10.3165
2008-04-01	15.1569
2008-07-01	14.8806
2008-10-01	16.6079
2009-01-01	17.9749
2009-04-01	18.0255
2009-07-01	22.4747
2009-10-01	22.8347
2010-01-01	19.3051
2010-04-01	19.8697
2010-07-01	20.5325
2010-10-01	21.9854
2011-01-01	20.8281
2011-04-01	22.7565
2011-07-01	23.4780
2011-10-01	19.9790
2012-01-01	21.8038
2012-04-01	18.3881
2012-07-01	20.4189
2012-10-01	17.9846
2013-01-01	17.6320
2013-04-01	22.7643
2013-07-01	21.9379
2013-10-01	21.7851
2014-01-01	27.2365
2014-04-01	24.1445
2014-07-01	19.6342
2014-10-01	25.5540
2015-01-01	20.7876
2015-04-01	22.7994