Quarter	Billions of US Dollars
1993-07-01	1.6306
1993-10-01	1.4045
1994-01-01	0.5857
1994-04-01	1.4755
1994-07-01	1.8129
1994-10-01	1.8202
1995-01-01	2.1832
1995-04-01	1.9195
1995-07-01	1.7097
1995-10-01	2.0713
1996-01-01	3.0270
1996-04-01	2.1671
1996-07-01	2.0565
1996-10-01	2.4357
1997-01-01	2.8975
1997-04-01	3.1006
1997-07-01	2.8186
1997-10-01	2.1880
1998-01-01	1.0877
1998-04-01	1.9000
1998-07-01	5.2800
1998-10-01	7.4317
1999-01-01	7.3141
1999-04-01	7.1540
1999-07-01	4.7923
1999-10-01	3.7711
2000-01-01	7.2337
2000-04-01	6.7960
2000-07-01	6.3358
2000-10-01	3.6878
2001-01-01	5.8695
2001-04-01	5.0937
2001-07-01	4.2483
2001-10-01	3.4424
2002-01-01	5.3110
2002-04-01	5.8365
2002-07-01	4.3718
2002-10-01	3.4108
2003-01-01	5.5820
2003-04-01	5.5525
2003-07-01	4.4640
2003-10-01	5.0111
2004-01-01	6.6524
2004-04-01	7.4618
2004-07-01	8.3321
2004-10-01	8.1261
2005-01-01	15.2567
2005-04-01	16.0730
2005-07-01	13.5075
2005-10-01	9.4574
2006-01-01	10.1018
2006-04-01	11.3698
2006-07-01	8.6452
2006-10-01	6.4693
2007-01-01	13.7759
2007-04-01	22.1850
2007-07-01	25.5256
2007-10-01	3.2973
2008-01-01	9.5597
2008-04-01	8.4315
2008-07-01	8.0226
2008-10-01	15.6928
2009-01-01	20.9713
2009-04-01	17.9952
2009-07-01	12.3035
2009-10-01	10.6889
2010-01-01	14.7028
2010-04-01	14.4964
2010-07-01	13.2095
2010-10-01	11.5230
2011-01-01	18.4498
2011-04-01	13.2721
2011-07-01	17.5806
2011-10-01	15.2286
2012-01-01	11.8175
2012-04-01	15.5904
2012-07-01	10.7493
2012-10-01	15.5606
2013-01-01	19.0377
2013-04-01	11.6408
2013-07-01	21.7561
2013-10-01	19.7059
2014-01-01	17.7315
2014-04-01	15.4585
2014-07-01	16.1491
2014-10-01	13.3881
2015-01-01	12.7580
2015-04-01	14.7651