Quarter	Billions of US Dollars
1993-07-01	0.8074
1993-10-01	0.7496
1994-01-01	0.9525
1994-04-01	1.4133
1994-07-01	1.8992
1994-10-01	2.2277
1995-01-01	2.1675
1995-04-01	2.5104
1995-07-01	2.8539
1995-10-01	4.0209
1996-01-01	3.7270
1996-04-01	3.0311
1996-07-01	1.7650
1996-10-01	2.6719
1997-01-01	2.6400
1997-04-01	3.0591
1997-07-01	1.9247
1997-10-01	2.4526
1998-01-01	1.9261
1998-04-01	1.7133
1998-07-01	2.4173
1998-10-01	1.5177
1999-01-01	2.2782
1999-04-01	3.0932
1999-07-01	3.3489
1999-10-01	5.0654
2000-01-01	4.3056
2000-04-01	7.2176
2000-07-01	7.8913
2000-10-01	17.2275
2001-01-01	12.9419
2001-04-01	16.3646
2001-07-01	14.4156
2001-10-01	13.1860
2002-01-01	11.3820
2002-04-01	10.1363
2002-07-01	12.5337
2002-10-01	12.8398
2003-01-01	21.3198
2003-04-01	25.4917
2003-07-01	18.5587
2003-10-01	18.3802
2004-01-01	20.6599
2004-04-01	20.0863
2004-07-01	21.1393
2004-10-01	20.1383
2005-01-01	23.9373
2005-04-01	22.9688
2005-07-01	18.0197
2005-10-01	15.3110
2006-01-01	16.7588
2006-04-01	27.8398
2006-07-01	24.4950
2006-10-01	19.4300
2007-01-01	19.1673
2007-04-01	19.2014
2007-07-01	21.2008
2007-10-01	18.9424
2008-01-01	21.0157
2008-04-01	30.9492
2008-07-01	33.3824
2008-10-01	32.2773
2009-01-01	24.8002
2009-04-01	28.8110
2009-07-01	23.7476
2009-10-01	19.2696
2010-01-01	18.6061
2010-04-01	21.0907
2010-07-01	23.1984
2010-10-01	18.8408
2011-01-01	19.4872
2011-04-01	26.3241
2011-07-01	24.1859
2011-10-01	18.1352
2012-01-01	13.6725
2012-04-01	22.0420
2012-07-01	20.6791
2012-10-01	16.9140
2013-01-01	21.0534
2013-04-01	23.6700
2013-07-01	26.2184
2013-10-01	26.3380
2014-01-01	27.1396
2014-04-01	26.8789
2014-07-01	21.0885
2014-10-01	19.7175
2015-01-01	14.9912
2015-04-01	19.8370