Quarter	Billions of US Dollars
1993-10-01	0.767
1994-01-01	0.767
1994-04-01	0.767
1994-07-01	0.767
1994-10-01	8.991
1995-01-01	8.818
1995-04-01	8.860
1995-07-01	8.839
1995-10-01	8.715
1996-01-01	8.617
1996-04-01	8.469
1996-07-01	8.346
1996-10-01	8.199
1997-01-01	8.107
1997-04-01	8.078
1997-07-01	8.079
1997-10-01	7.948
1998-01-01	7.807
1998-04-01	7.654
1998-07-01	7.497
1998-10-01	7.338
1999-01-01	7.122
1999-04-01	7.122
1999-07-01	6.990
1999-10-01	6.938
2000-01-01	6.960
2000-04-01	6.956
2000-07-01	6.938
2000-10-01	6.920
2001-01-01	6.923
2001-04-01	6.935
2001-07-01	6.966
2001-10-01	7.007
2002-01-01	6.908
2002-04-01	6.888
2002-07-01	6.785
2002-10-01	6.913
2003-01-01	6.939
2003-04-01	7.062
2003-07-01	7.027
2003-10-01	7.175
2004-01-01	7.289
2004-04-01	7.223
2004-07-01	7.492
2004-10-01	7.727
2005-01-01	7.945
2005-04-01	8.299
2005-07-01	9.235
2005-10-01	9.388
2006-01-01	9.613
2006-04-01	9.865
2006-07-01	9.997
2006-10-01	10.366
2007-01-01	10.547
2007-04-01	10.813
2007-07-01	12.593
2007-10-01	13.206
2008-01-01	14.225
2008-04-01	13.744
2008-07-01	13.437
2008-10-01	12.922
2009-01-01	12.919
2009-04-01	13.601
2009-07-01	14.262
2009-10-01	14.396
2010-01-01	14.761
2010-04-01	15.318
2010-07-01	15.844
2010-10-01	17.279
2011-01-01	17.321
2011-04-01	17.610
2011-07-01	17.596
2011-10-01	18.131
2012-01-01	18.983
2012-04-01	19.051
2012-07-01	19.543
2012-10-01	19.735
2013-01-01	19.877
2013-04-01	18.554
2013-07-01	18.587
2013-10-01	18.635
2014-01-01	18.616
2014-04-01	19.130
2014-07-01	18.978
2014-10-01	18.454
2015-01-01	18.045