Quarter	Billions of US Dollars
1993-10-01	1.515
1994-01-01	2.261
1994-04-01	2.664
1994-07-01	3.132
1994-10-01	3.213
1995-01-01	3.267
1995-04-01	3.223
1995-07-01	3.064
1995-10-01	3.053
1996-01-01	2.840
1996-04-01	2.941
1996-07-01	4.077
1996-10-01	5.969
1997-01-01	7.059
1997-04-01	7.655
1997-07-01	7.990
1997-10-01	8.691
1998-01-01	9.099
1998-04-01	10.013
1998-07-01	9.982
1998-10-01	11.244
1999-01-01	11.199
1999-04-01	11.676
1999-07-01	12.770
1999-10-01	12.970
2000-01-01	13.432
2000-04-01	13.546
2000-07-01	13.909
2000-10-01	13.838
2001-01-01	14.246
2001-04-01	14.554
2001-07-01	14.892
2001-10-01	15.966
2002-01-01	15.728
2002-04-01	16.253
2002-07-01	16.335
2002-10-01	14.771
2003-01-01	15.145
2003-04-01	15.286
2003-07-01	16.299
2003-10-01	16.379
2004-01-01	16.702
2004-04-01	15.500
2004-07-01	14.256
2004-10-01	13.775
2005-01-01	12.495
2005-04-01	13.491
2005-07-01	14.493
2005-10-01	15.512
2006-01-01	15.950
2006-04-01	15.994
2006-07-01	17.087
2006-10-01	17.819
2007-01-01	18.210
2007-04-01	16.854
2007-07-01	18.026
2007-10-01	18.983
2008-01-01	20.228
2008-04-01	21.859
2008-07-01	23.244
2008-10-01	24.113
2009-01-01	23.997
2009-04-01	24.362
2009-07-01	25.784
2009-10-01	27.093
2010-01-01	27.954
2010-04-01	27.882
2010-07-01	27.690
2010-10-01	29.058
2011-01-01	29.181
2011-04-01	29.999
2011-07-01	30.704
2011-10-01	30.854
2012-01-01	31.685
2012-04-01	30.423
2012-07-01	30.957
2012-10-01	31.475
2013-01-01	32.402
2013-04-01	32.789
2013-07-01	34.671
2013-10-01	35.871
2014-01-01	36.946
2014-04-01	38.061
2014-07-01	38.549
2014-10-01	39.626
2015-01-01	40.796