Quarter	Billions of US Dollars
1989-07-01	0.02000
1989-10-01	0.02400
1990-01-01	0.03000
1990-04-01	0.04800
1990-07-01	0.01200
1990-10-01	0.00500
1991-01-01	0.00400
1991-04-01	0.11200
1991-07-01	0.13200
1991-10-01	0.08400
1992-01-01	0.93300
1992-04-01	0.10400
1992-07-01	0.03700
1992-10-01	0.11000
1993-01-01	0.20800
1993-04-01	0.24000
1993-07-01	0.50464
1993-10-01	0.38369
1994-01-01	0.46108
1994-04-01	0.24488
1994-07-01	0.25209
1994-10-01	0.16396
1995-01-01	0.15547
1995-04-01	0.16820
1995-07-01	0.21915
1995-10-01	0.21755
1996-01-01	0.15034
1996-04-01	0.35096
1996-07-01	0.23380
1996-10-01	0.29343
1997-01-01	0.23686
1997-04-01	0.26130
1997-07-01	0.34291
1997-10-01	0.33706
1998-01-01	0.27826
1998-04-01	0.32624
1998-07-01	0.32492
1998-10-01	0.45104
1999-01-01	0.50875
1999-04-01	0.37278
1999-07-01	0.38781
1999-10-01	0.49555
2000-01-01	0.47854
2000-04-01	0.34670
2000-07-01	0.37115
2000-10-01	0.34785
2001-01-01	0.34357
2001-04-01	0.47759
2001-07-01	0.40769
2001-10-01	0.39103
2002-01-01	0.39433
2002-04-01	0.38968
2002-07-01	0.40970
2002-10-01	0.40092
2003-01-01	0.71010
2003-04-01	0.71873
2003-07-01	0.55361
2003-10-01	0.73432
2004-01-01	0.65073
2004-04-01	0.83839
2004-07-01	1.79002
2004-10-01	1.73385
2005-01-01	1.22631
2005-04-01	1.01477
2005-07-01	1.07458
2005-10-01	1.19114
2006-01-01	1.54210
2006-04-01	0.88932
2006-07-01	1.04272
2006-10-01	1.35247
2007-01-01	0.92282
2007-04-01	0.78559
2007-07-01	1.03206
2007-10-01	1.30857
2008-01-01	1.93339
2008-04-01	1.80071
2008-07-01	0.75924
2008-10-01	0.55596
2009-01-01	0.49575
2009-04-01	0.55821
2009-07-01	0.64588
2009-10-01	0.68246
2010-01-01	1.24975
2010-04-01	0.97119
2010-07-01	1.07693
2010-10-01	1.31193
2011-01-01	1.34985
2011-04-01	0.91620
2011-07-01	1.02611
2011-10-01	0.97031
2012-01-01	0.96861
2012-04-01	0.99935
2012-07-01	1.19727
2012-10-01	1.51256
2013-01-01	0.97344
2013-04-01	0.92360
2013-07-01	0.88626
2013-10-01	0.75776
2014-01-01	3.78916
2014-04-01	6.04849
2014-07-01	7.80565
2014-10-01	8.11595
2015-01-01	4.62015
2015-04-01	3.29635