Quarter	Billions of US Dollars
1993-07-01	1.92851
1993-10-01	2.07220
1994-01-01	1.78601
1994-04-01	1.71678
1994-07-01	1.58195
1994-10-01	1.49237
1995-01-01	1.66472
1995-04-01	1.48312
1995-07-01	1.25438
1995-10-01	2.06320
1996-01-01	1.90061
1996-04-01	1.43351
1996-07-01	1.52506
1996-10-01	2.30231
1997-01-01	1.54750
1997-04-01	1.95698
1997-07-01	1.73676
1997-10-01	1.01232
1998-01-01	1.25295
1998-04-01	0.98982
1998-07-01	1.61280
1998-10-01	0.35846
1999-01-01	0.25261
1999-04-01	0.23376
1999-07-01	0.15001
1999-10-01	0.43892
2000-01-01	0.30137
2000-04-01	0.36092
2000-07-01	0.17419
2000-10-01	0.41239
2001-01-01	0.13187
2001-04-01	0.14969
2001-07-01	0.16999
2001-10-01	0.07393
2002-01-01	0.02295
2003-04-01	0.03100
2003-07-01	0.01400
2004-07-01	0.01250
2005-04-01	0.00012
2005-10-01	0.21004
2006-01-01	0.06535
2006-07-01	0.05188
2006-10-01	0.18793
2007-01-01	0.09966
2007-04-01	0.96342
2007-07-01	0.39250
2007-10-01	0.36233
2008-01-01	0.66794
2008-04-01	0.00489
2008-10-01	0.09408
2009-01-01	0.82195
2009-04-01	0.27396
2009-07-01	0.16932
2009-10-01	0.04742
2010-01-01	0.01231
2010-04-01	0.10000
2010-07-01	0.00232
2010-10-01	0.05974
2011-01-01	0.04013
2011-04-01	0.11934
2011-07-01	1.17874
2011-10-01	0.51024
2012-01-01	0.11712
2012-04-01	0.01476
2012-07-01	0.18090
2012-10-01	0.50873
2013-01-01	0.35922
2013-04-01	1.28599
2013-07-01	0.33388
2013-10-01	0.36126
2014-01-01	0.30312
2014-04-01	0.19763
2014-07-01	0.35779
2014-10-01	0.05703
2015-01-01	0.29125
2015-04-01	0.18998