Quarter	Billions of US Dollars
1966-01-01	0.01500
1972-01-01	0.05020
1972-04-01	0.01500
1974-07-01	0.03350
1974-10-01	0.08450
1975-01-01	0.03110
1975-04-01	0.14440
1975-07-01	0.22820
1975-10-01	0.03310
1976-04-01	0.15050
1976-07-01	0.07130
1976-10-01	0.19120
1977-01-01	0.02990
1977-04-01	0.23100
1977-07-01	0.17320
1977-10-01	0.11030
1978-01-01	0.30300
1978-04-01	0.17360
1978-10-01	0.31600
1979-01-01	0.12590
1979-04-01	0.15190
1979-07-01	0.21830
1979-10-01	0.05630
1980-04-01	0.12200
1980-07-01	0.14030
1980-10-01	0.02500
1981-01-01	0.09670
1981-04-01	0.11430
1981-07-01	0.09380
1981-10-01	0.29360
1982-01-01	0.47260
1982-04-01	0.22200
1982-07-01	0.14990
1982-10-01	0.43550
1983-01-01	0.39750
1983-04-01	0.16050
1984-01-01	0.13550
1984-04-01	0.33970
1984-07-01	0.42090
1984-10-01	0.52830
1985-01-01	0.01920
1985-04-01	0.63590
1985-07-01	0.15400
1985-10-01	0.41500
1986-01-01	0.95000
1986-04-01	0.56950
1986-07-01	1.20000
1986-10-01	1.19790
1987-01-01	0.88760
1987-04-01	0.23960
1987-07-01	0.09910
1987-10-01	0.35640
1988-01-01	0.50580
1988-04-01	0.60020
1988-07-01	0.11160
1988-10-01	0.06250
1989-04-01	0.46830
1989-07-01	0.58500
1989-10-01	0.35000
1990-01-01	0.29530
1990-04-01	0.54530
1991-10-01	0.02840
1992-01-01	0.10560
1993-04-01	0.23400
1993-07-01	0.67658
1993-10-01	0.14333
1994-01-01	1.32413
1994-04-01	0.36342
1994-07-01	0.07220
1994-10-01	0.23415
1995-01-01	0.10276
1995-04-01	0.47158
1995-07-01	0.29500
1995-10-01	0.04928
1996-01-01	0.27592
1996-04-01	0.79767
1996-07-01	0.93479
1996-10-01	0.04920
1997-01-01	0.80208
1997-04-01	0.82743
1997-07-01	0.73502
1997-10-01	0.28441
1998-01-01	0.61952
1998-04-01	0.05559
1998-07-01	0.16967
1998-10-01	0.08687
1999-01-01	0.48107
1999-04-01	0.00004
1999-07-01	0.35050
2000-01-01	0.01934
2000-04-01	0.94794
2000-07-01	0.09648
2000-10-01	0.09000
2001-01-01	0.01000
2001-04-01	0.22459
2001-07-01	0.04873
2001-10-01	0.59812
2002-01-01	0.19390
2002-04-01	0.95322
2002-07-01	0.05000
2002-10-01	0.06832
2003-01-01	0.13067
2003-04-01	0.64150
2003-10-01	0.18365
2004-01-01	0.61684
2004-04-01	0.46581
2004-07-01	2.00837
2004-10-01	1.34336
2005-01-01	1.68356
2005-04-01	2.14142
2005-07-01	0.30173
2005-10-01	1.87357
2006-01-01	0.30848
2006-04-01	0.84600
2006-07-01	0.23909
2006-10-01	0.65469
2007-01-01	0.12976
2007-04-01	0.52108
2007-07-01	0.41228
2007-10-01	0.32769
2008-01-01	0.03000
2008-04-01	0.81758
2008-07-01	0.39534
2008-10-01	0.35225
2009-07-01	0.22000
2009-10-01	1.79276
2010-01-01	0.26163
2010-04-01	1.13390
2010-07-01	0.55330
2010-10-01	3.35000
2011-01-01	2.07500
2011-04-01	0.62214
2011-07-01	3.03913
2011-10-01	1.11674
2012-01-01	1.61588
2012-04-01	0.33228
2012-07-01	3.33646
2012-10-01	0.25865
2013-01-01	1.81805
2013-04-01	0.65181
2013-07-01	0.62630
2013-10-01	0.01422
2014-01-01	1.40594
2014-04-01	1.30380
2014-07-01	0.72209
2014-10-01	0.26992
2015-04-01	0.30941