Quarter	Billions of US Dollars
1993-07-01	10.979
1993-10-01	10.132
1994-01-01	11.616
1994-04-01	12.775
1994-07-01	11.526
1994-10-01	10.308
1995-01-01	10.154
1995-04-01	11.022
1995-07-01	13.051
1995-10-01	13.261
1996-01-01	12.936
1996-04-01	13.499
1996-07-01	12.777
1996-10-01	12.652
1997-01-01	12.670
1997-04-01	12.968
1997-07-01	14.510
1997-10-01	15.701
1998-01-01	16.572
1998-04-01	16.108
1998-07-01	16.628
1998-10-01	16.105
1999-01-01	15.955
1999-04-01	16.760
1999-07-01	22.334
1999-10-01	22.027
2000-01-01	23.111
2000-04-01	24.952
2000-07-01	22.694
2000-10-01	24.045
2001-01-01	23.429
2001-04-01	21.540
2001-07-01	23.666
2001-10-01	25.098
2002-01-01	24.053
2002-04-01	25.613
2002-07-01	27.451
2002-10-01	23.715
2003-01-01	24.530
2003-04-01	23.854
2003-07-01	23.260
2003-10-01	30.652
2004-01-01	34.322
2004-04-01	32.689
2004-07-01	36.511
2004-10-01	43.522
2005-01-01	41.383
2005-04-01	48.630
2005-07-01	51.111
2005-10-01	49.824
2006-01-01	55.250
2006-04-01	58.942
2006-07-01	56.651
2006-10-01	55.422
2007-01-01	63.185
2007-04-01	65.954
2007-07-01	69.147
2007-10-01	81.354
2008-01-01	89.488
2008-04-01	96.133
2008-07-01	100.897
2008-10-01	79.416
2009-01-01	83.595
2009-04-01	101.634
2009-07-01	107.097
2009-10-01	103.352
2010-01-01	109.368
2010-04-01	90.787
2010-07-01	96.820
2010-10-01	99.159
2011-01-01	94.842
2011-04-01	93.410
2011-07-01	104.978
2011-10-01	94.599
2012-01-01	99.263
2012-04-01	109.681
2012-07-01	104.443
2012-10-01	98.685
2013-01-01	97.859
2013-04-01	109.535
2013-07-01	117.106
2013-10-01	107.085
2014-01-01	99.422
2014-04-01	91.675
2014-07-01	87.620
2014-10-01	83.826
2015-01-01	79.809
2015-04-01	91.360