Quarter	Billions of US Dollars
1993-07-01	1.7173
1993-10-01	1.6364
1994-01-01	1.8730
1994-04-01	1.8988
1994-07-01	2.9704
1994-10-01	2.5110
1995-01-01	3.6467
1995-04-01	4.4133
1995-07-01	4.1630
1995-10-01	6.3237
1996-01-01	5.5305
1996-04-01	5.9079
1996-07-01	6.9144
1996-10-01	7.3188
1997-01-01	6.0636
1997-04-01	6.2243
1997-07-01	6.4287
1997-10-01	6.7390
1998-01-01	7.3674
1998-04-01	5.8516
1998-07-01	5.5017
1998-10-01	7.1597
1999-01-01	7.7872
1999-04-01	4.8207
1999-07-01	4.8025
1999-10-01	3.8172
2000-01-01	6.1538
2000-04-01	4.3462
2000-07-01	5.3938
2000-10-01	4.6877
2001-01-01	7.5690
2001-04-01	6.3303
2001-07-01	7.5966
2001-10-01	8.7710
2002-01-01	8.0245
2002-04-01	8.1491
2002-07-01	10.4474
2002-10-01	11.4860
2003-01-01	14.3829
2003-04-01	13.7688
2003-07-01	13.6086
2003-10-01	15.8108
2004-01-01	15.4082
2004-04-01	13.2691
2004-07-01	14.1119
2004-10-01	10.1710
2005-01-01	11.6930
2005-04-01	13.9693
2005-07-01	14.3128
2005-10-01	12.8835
2006-01-01	12.6727
2006-04-01	13.4262
2006-07-01	12.9998
2006-10-01	13.0436
2007-01-01	15.6408
2007-04-01	16.3714
2007-07-01	14.7580
2007-10-01	19.0295
2008-01-01	19.6283
2008-04-01	19.9806
2008-07-01	19.0946
2008-10-01	14.4974
2009-01-01	18.8182
2009-04-01	14.3180
2009-07-01	17.6993
2009-10-01	13.9203
2010-01-01	12.2688
2010-04-01	11.2705
2010-07-01	10.6283
2010-10-01	8.7595
2011-01-01	10.1510
2011-04-01	13.0691
2011-07-01	10.5256
2011-10-01	8.3883
2012-01-01	13.6502
2012-04-01	8.4613
2012-07-01	6.6115
2012-10-01	5.1343
2013-01-01	4.7014
2013-04-01	4.2048
2013-07-01	4.3700
2013-10-01	3.6199
2014-01-01	4.2269
2014-04-01	4.2198
2014-07-01	2.7801
2014-10-01	2.2551
2015-01-01	1.4727
2015-04-01	2.5092