Quarter	Billions of US Dollars
1993-07-01	4.1289
1993-10-01	4.6982
1994-01-01	4.6883
1994-04-01	4.6883
1994-07-01	4.5532
1994-10-01	4.5007
1995-01-01	4.3396
1995-04-01	4.3603
1995-07-01	4.4340
1995-10-01	5.0980
1996-01-01	5.8468
1996-04-01	7.4582
1996-07-01	8.3247
1996-10-01	10.5495
1997-01-01	10.2821
1997-04-01	11.7212
1997-07-01	13.3187
1997-10-01	13.4850
1998-01-01	14.2743
1998-04-01	14.5413
1998-07-01	13.9707
1998-10-01	13.4174
1999-01-01	12.4195
1999-04-01	12.1801
1999-07-01	12.1676
1999-10-01	12.3221
2000-01-01	12.7022
2000-04-01	13.1740
2000-07-01	13.1704
2000-10-01	12.9063
2001-01-01	13.3206
2001-04-01	12.3156
2001-07-01	12.1226
2001-10-01	11.6348
2002-01-01	11.1043
2002-04-01	11.6222
2002-07-01	11.8658
2002-10-01	11.6614
2003-01-01	12.0106
2003-04-01	12.6143
2003-07-01	12.8774
2003-10-01	13.8809
2004-01-01	14.5848
2004-04-01	13.4805
2004-07-01	12.3821
2004-10-01	11.1214
2005-01-01	10.8005
2005-04-01	10.2464
2005-07-01	10.3006
2005-10-01	11.2722
2006-01-01	12.9126
2006-04-01	13.2865
2006-07-01	14.7153
2006-10-01	14.6152
2007-01-01	15.3844
2007-04-01	16.0221
2007-07-01	15.8601
2007-10-01	15.9070
2008-01-01	15.3354
2008-04-01	15.2293
2008-07-01	14.2427
2008-10-01	13.5461
2009-01-01	13.2391
2009-04-01	14.6876
2009-07-01	16.5291
2009-10-01	17.2153
2010-01-01	19.7221
2010-04-01	19.6650
2010-07-01	21.1796
2010-10-01	24.1188
2011-01-01	23.3700
2011-04-01	27.5623
2011-07-01	29.1059
2011-10-01	30.7405
2012-01-01	33.5836
2012-04-01	34.1796
2012-07-01	36.6660
2012-10-01	38.2676
2013-01-01	39.1019
2013-04-01	40.3717
2013-07-01	39.2841
2013-10-01	39.4738
2014-01-01	39.0066
2014-04-01	39.9919
2014-07-01	40.5016
2014-10-01	41.0458
2015-01-01	39.4504
2015-04-01	41.3224