Quarter	Billions of US Dollars
1993-07-01	3.8975
1993-10-01	3.7234
1994-01-01	3.4404
1994-04-01	3.5287
1994-07-01	3.7954
1994-10-01	3.9707
1995-01-01	3.8418
1995-04-01	3.6641
1995-07-01	3.5660
1995-10-01	3.4453
1996-01-01	3.3528
1996-04-01	4.1182
1996-07-01	4.3435
1996-10-01	5.1657
1997-01-01	5.5121
1997-04-01	5.4659
1997-07-01	6.5789
1997-10-01	6.7888
1998-01-01	7.0214
1998-04-01	8.2847
1998-07-01	8.6169
1998-10-01	10.5359
1999-01-01	11.7411
1999-04-01	12.0491
1999-07-01	12.6746
1999-10-01	12.9913
2000-01-01	13.3968
2000-04-01	14.4339
2000-07-01	15.7128
2000-10-01	15.4754
2001-01-01	13.8727
2001-04-01	13.7741
2001-07-01	12.9543
2001-10-01	13.3154
2002-01-01	13.8202
2002-04-01	14.7068
2002-07-01	14.4277
2002-10-01	15.7154
2003-01-01	15.6840
2003-04-01	15.7726
2003-07-01	16.0409
2003-10-01	16.7351
2004-01-01	16.8151
2004-04-01	17.0493
2004-07-01	17.1294
2004-10-01	18.3808
2005-01-01	17.6450
2005-04-01	17.3472
2005-07-01	17.2134
2005-10-01	16.7612
2006-01-01	16.5068
2006-04-01	16.6453
2006-07-01	18.9064
2006-10-01	18.7395
2007-01-01	18.7320
2007-04-01	19.9277
2007-07-01	20.5800
2007-10-01	20.6896
2008-01-01	21.5694
2008-04-01	21.8739
2008-07-01	20.5489
2008-10-01	19.6904
2009-01-01	22.4655
2009-04-01	27.3771
2009-07-01	27.8325
2009-10-01	28.2505
2010-01-01	27.5259
2010-04-01	25.7002
2010-07-01	29.1865
2010-10-01	29.2538
2011-01-01	30.5788
2011-04-01	30.6628
2011-07-01	28.8708
2011-10-01	29.8781
2012-01-01	30.6556
2012-04-01	32.1021
2012-07-01	33.5600
2012-10-01	36.9775
2013-01-01	35.6723
2013-04-01	40.7806
2013-07-01	45.3628
2013-10-01	50.6723
2014-01-01	50.4720
2014-04-01	49.9538
2014-07-01	48.1929
2014-10-01	48.4611
2015-01-01	50.4705
2015-04-01	51.0932