Quarter	Billions of US Dollars
1993-07-01	0.12915
1993-10-01	0.09097
1994-01-01	0.09547
1994-04-01	0.10005
1994-07-01	0.10439
1994-10-01	0.10272
1995-01-01	0.02114
1995-04-01	0.02107
1995-07-01	0.02060
1995-10-01	0.02040
1996-01-01	0.01979
1996-04-01	0.01915
1997-10-01	0.32500
1998-01-01	0.32500
1998-04-01	0.32500
1998-07-01	0.32500
1998-10-01	0.32500
1999-01-01	0.32500
1999-04-01	0.32500
1999-07-01	0.48965
1999-10-01	0.48664
2000-01-01	0.48451
2000-04-01	0.47622
2000-07-01	0.47201
2000-10-01	0.47422
2001-01-01	0.89953
2001-04-01	0.88017
2001-07-01	0.91863
2001-10-01	1.11865
2002-01-01	1.10750
2002-04-01	1.19714
2002-07-01	1.19819
2002-10-01	0.88801
2003-01-01	0.90697
2003-04-01	0.93517
2003-07-01	0.94691
2003-10-01	1.20785
2004-01-01	1.11954
2004-04-01	0.96948
2004-07-01	0.98137
2004-10-01	0.71914
2005-01-01	0.84950
2005-04-01	0.79353
2005-07-01	0.78963
2005-10-01	0.77331
2006-01-01	0.73668
2006-04-01	0.61506
2006-07-01	0.61384
2006-10-01	0.44588
2007-01-01	0.45006
2007-04-01	0.45698
2007-07-01	0.47749
2007-10-01	0.49247
2008-01-01	0.54248
2008-04-01	0.54112
2008-07-01	0.63015
2008-10-01	3.38813
2009-01-01	3.69109
2009-04-01	5.04450
2009-07-01	5.17241
2009-10-01	5.70498
2010-01-01	5.43820
2010-04-01	5.22325
2010-07-01	5.61809
2010-10-01	7.72393
2011-01-01	8.04491
2011-04-01	8.28742
2011-07-01	8.13872
2011-10-01	7.93195
2012-01-01	8.16716
2012-04-01	6.21011
2012-07-01	6.62679
2012-10-01	7.72013
2013-01-01	8.09990
2013-04-01	7.79577
2013-07-01	7.92730
2013-10-01	8.01533
2014-01-01	8.76450
2014-04-01	8.25685
2014-07-01	6.56039
2014-10-01	6.46744
2015-01-01	7.10228
2015-04-01	7.85658