Quarter	Billions of US Dollars
1993-07-01	3.631
1993-10-01	2.831
1994-01-01	4.103
1994-04-01	3.918
1994-07-01	2.646
1994-10-01	2.635
1995-01-01	2.567
1995-04-01	2.551
1995-07-01	2.447
1995-10-01	2.632
1996-01-01	5.706
1996-04-01	4.383
1996-07-01	2.498
1996-10-01	9.721
1997-01-01	4.849
1997-04-01	4.362
1997-07-01	7.322
1997-10-01	7.939
1998-01-01	5.959
1998-04-01	6.388
1998-07-01	4.384
1998-10-01	6.096
1999-01-01	5.000
1999-04-01	10.092
1999-07-01	6.671
1999-10-01	7.690
2000-01-01	5.291
2000-04-01	10.902
2000-07-01	14.653
2000-10-01	9.286
2001-01-01	7.444
2001-04-01	9.138
2001-07-01	11.483
2001-10-01	9.074
2002-01-01	6.777
2002-04-01	11.238
2002-07-01	11.177
2002-10-01	9.569
2003-01-01	11.456
2003-04-01	15.895
2003-07-01	14.108
2003-10-01	14.273
2004-01-01	30.698
2004-04-01	21.483
2004-07-01	22.201
2004-10-01	27.695
2005-01-01	29.270
2005-04-01	31.162
2005-07-01	34.778
2005-10-01	49.769
2006-01-01	34.156
2006-04-01	32.336
2006-07-01	31.232
2006-10-01	62.015
2007-01-01	58.561
2007-04-01	48.764
2007-07-01	34.616
2007-10-01	29.895
2008-01-01	15.324
2008-04-01	137.832
2008-07-01	173.304
2008-10-01	227.719
2009-01-01	77.274
2009-04-01	33.141
2009-07-01	50.032
2009-10-01	39.487
2010-01-01	25.399
2010-04-01	17.557
2010-07-01	24.452
2010-10-01	20.655
2011-01-01	25.333
2011-04-01	40.556
2011-07-01	22.238
2011-10-01	53.151
2012-01-01	39.113
2012-04-01	34.719
2012-07-01	31.894
2012-10-01	17.436
2013-01-01	27.194
2013-04-01	27.690
2013-07-01	19.215
2013-10-01	30.682
2014-01-01	23.280
2014-04-01	27.048
2014-07-01	34.982
2014-10-01	21.942
2015-01-01	28.161
2015-04-01	18.721