Quarter	Billions of US Dollars
1993-07-01	8.5968
1993-10-01	8.3919
1994-01-01	8.7941
1994-04-01	8.7963
1994-07-01	8.9587
1994-10-01	8.7986
1995-01-01	9.0679
1995-04-01	9.0384
1995-07-01	8.9353
1995-10-01	8.2061
1996-01-01	8.2758
1996-04-01	7.1802
1996-07-01	6.0090
1996-10-01	6.8764
1997-01-01	6.7482
1997-04-01	7.5971
1997-07-01	7.1182
1997-10-01	7.2974
1998-01-01	7.1441
1998-04-01	6.6660
1998-07-01	6.4833
1998-10-01	6.5168
1999-01-01	7.2965
1999-04-01	6.8631
1999-07-01	8.3046
1999-10-01	8.0443
2000-01-01	8.2245
2000-04-01	7.8869
2000-07-01	7.5012
2000-10-01	7.6139
2001-01-01	7.2668
2001-04-01	6.7713
2001-07-01	7.0901
2001-10-01	7.2484
2002-01-01	7.1836
2002-04-01	8.4712
2002-07-01	8.5949
2002-10-01	9.2138
2003-01-01	9.0303
2003-04-01	9.4174
2003-07-01	10.0490
2003-10-01	11.1253
2004-01-01	11.3368
2004-04-01	11.3052
2004-07-01	10.4782
2004-10-01	11.8300
2005-01-01	12.1032
2005-04-01	11.5942
2005-07-01	11.4184
2005-10-01	11.6910
2006-01-01	11.7597
2006-04-01	11.8838
2006-07-01	9.6583
2006-10-01	9.1070
2007-01-01	8.7744
2007-04-01	9.8422
2007-07-01	9.2301
2007-10-01	7.3689
2008-01-01	7.4135
2008-04-01	7.4571
2008-07-01	6.8106
2008-10-01	7.1565
2009-01-01	6.8637
2009-04-01	8.6017
2009-07-01	7.7008
2009-10-01	7.5935
2010-01-01	7.1921
2010-04-01	7.6832
2010-07-01	7.5156
2010-10-01	7.4081
2011-01-01	7.6149
2011-04-01	6.9909
2011-07-01	6.7092
2011-10-01	6.6391
2012-01-01	6.8745
2012-04-01	6.1065
2012-07-01	6.8279
2012-10-01	6.2918
2013-01-01	5.8177
2013-04-01	5.9744
2013-07-01	6.3599
2013-10-01	7.4045
2014-01-01	7.6496
2014-04-01	7.3281
2014-07-01	6.2877
2014-10-01	6.7523
2015-01-01	6.5656
2015-04-01	6.9080