Quarter	Billions of US Dollars
1993-07-01	50.1743
1993-10-01	45.5024
1994-01-01	43.5351
1994-04-01	43.6308
1994-07-01	44.2981
1994-10-01	39.3221
1995-01-01	41.4854
1995-04-01	40.9177
1995-07-01	36.8415
1995-10-01	41.4119
1996-01-01	43.1313
1996-04-01	45.7894
1996-07-01	47.7908
1996-10-01	46.1192
1997-01-01	49.9863
1997-04-01	52.2118
1997-07-01	46.5430
1997-10-01	37.3462
1998-01-01	27.1625
1998-04-01	20.1579
1998-07-01	18.0284
1998-10-01	25.5658
1999-01-01	27.7332
1999-04-01	29.3801
1999-07-01	31.5015
1999-10-01	27.7599
2000-01-01	21.0154
2000-04-01	19.2082
2000-07-01	16.1042
2000-10-01	15.2750
2001-01-01	12.3669
2001-04-01	10.7361
2001-07-01	12.4210
2001-10-01	11.5679
2002-01-01	13.3105
2002-04-01	13.7442
2002-07-01	13.7894
2002-10-01	11.9547
2003-01-01	10.8338
2003-04-01	11.4066
2003-07-01	10.8179
2003-10-01	10.1185
2004-01-01	8.6176
2004-04-01	8.8075
2004-07-01	6.5174
2004-10-01	6.9354
2005-01-01	6.8905
2005-04-01	8.2751
2005-07-01	10.2736
2005-10-01	12.8845
2006-01-01	15.5921
2006-04-01	15.1133
2006-07-01	14.2119
2006-10-01	11.6728
2007-01-01	9.0138
2007-04-01	8.0613
2007-07-01	6.3381
2007-10-01	9.3159
2008-01-01	10.1354
2008-04-01	16.0212
2008-07-01	16.8492
2008-10-01	17.5806
2009-01-01	16.1591
2009-04-01	12.2051
2009-07-01	11.1736
2009-10-01	9.4644
2010-01-01	8.6451
2010-04-01	13.1858
2010-07-01	16.7347
2010-10-01	16.9649
2011-01-01	16.4504
2011-04-01	9.7088
2011-07-01	6.8523
2011-10-01	5.9358
2012-01-01	6.2558
2012-04-01	6.4261
2012-07-01	7.1804
2012-10-01	7.9610
2013-01-01	8.4384
2013-04-01	8.8607
2013-07-01	8.7112
2013-10-01	8.3100
2014-01-01	9.9226
2014-04-01	9.1536
2014-07-01	11.5109
2014-10-01	10.9345
2015-01-01	6.5077
2015-04-01	7.7635