Quarter	Billions of US Dollars
1993-07-01	9.812
1993-10-01	10.528
1994-01-01	13.359
1994-04-01	13.411
1994-07-01	13.670
1994-10-01	13.196
1995-01-01	11.883
1995-04-01	11.943
1995-07-01	12.059
1995-10-01	12.093
1996-01-01	11.765
1996-04-01	11.682
1996-07-01	11.289
1996-10-01	11.093
1997-01-01	11.545
1997-04-01	13.015
1997-07-01	15.227
1997-10-01	14.551
1998-01-01	15.750
1998-04-01	15.712
1998-07-01	16.714
1998-10-01	16.770
1999-01-01	16.207
1999-04-01	18.270
1999-07-01	18.140
1999-10-01	18.386
2000-01-01	19.638
2000-04-01	19.972
2000-07-01	19.898
2000-10-01	19.009
2001-01-01	19.823
2001-04-01	19.706
2001-07-01	20.242
2001-10-01	19.965
2002-01-01	18.610
2002-04-01	17.731
2002-07-01	16.850
2002-10-01	17.022
2003-01-01	15.991
2003-04-01	15.306
2003-07-01	14.467
2003-10-01	15.639
2004-01-01	15.907
2004-04-01	14.259
2004-07-01	14.210
2004-10-01	14.201
2005-01-01	15.990
2005-04-01	16.403
2005-07-01	17.486
2005-10-01	18.280
2006-01-01	18.673
2006-04-01	17.723
2006-07-01	17.715
2006-10-01	19.307
2007-01-01	20.389
2007-04-01	19.775
2007-07-01	19.108
2007-10-01	20.948
2008-01-01	20.639
2008-04-01	19.849
2008-07-01	19.725
2008-10-01	16.715
2009-01-01	17.082
2009-04-01	17.652
2009-07-01	20.182
2009-10-01	25.579
2010-01-01	31.254
2010-04-01	37.705
2010-07-01	40.979
2010-10-01	38.131
2011-01-01	41.710
2011-04-01	46.142
2011-07-01	50.118
2011-10-01	54.328
2012-01-01	60.386
2012-04-01	62.135
2012-07-01	70.501
2012-10-01	76.395
2013-01-01	80.557
2013-04-01	82.626
2013-07-01	92.999
2013-10-01	101.766
2014-01-01	105.505
2014-04-01	110.874
2014-07-01	112.849
2014-10-01	115.134
2015-01-01	115.228
2015-04-01	125.928