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	0.33970
1983-04-01	0.16050
1984-01-01	0.13550
1984-04-01	0.33970
1984-07-01	0.42090
1984-10-01	0.57830
1985-01-01	0.06600
1985-04-01	0.76930
1985-07-01	0.23570
1985-10-01	0.55280
1986-01-01	1.07160
1986-04-01	0.56950
1986-07-01	1.59297
1986-10-01	1.45170
1987-01-01	1.03030
1987-04-01	0.66160
1987-07-01	0.32570
1987-10-01	0.81360
1988-01-01	0.70350
1988-04-01	0.71930
1988-07-01	0.11160
1988-10-01	0.11570
1989-01-01	0.11089
1989-04-01	0.46830
1989-07-01	0.66160
1989-10-01	0.35000
1990-01-01	0.33220
1990-04-01	0.54530
1990-07-01	0.02960
1990-10-01	0.13150
1991-01-01	0.08970
1991-04-01	0.04370
1992-01-01	0.04060
1992-04-01	0.04030
1993-04-01	0.28830
1993-07-01	0.71818
1993-10-01	0.14333
1994-01-01	1.45862
1994-04-01	0.21342
1994-10-01	0.38715
1995-01-01	0.06883
1995-04-01	0.63358
1995-07-01	0.17000
1995-10-01	0.20445
1996-01-01	0.28092
1996-04-01	1.24767
1996-07-01	0.93479
1996-10-01	0.04920
1997-01-01	0.80208
1997-04-01	0.39842
1997-07-01	0.72935
1997-10-01	0.28441
1998-01-01	0.61952
1998-04-01	0.17729
1998-07-01	0.16459
1998-10-01	0.08687
1999-01-01	0.48107
1999-04-01	0.00004
2000-04-01	0.87052
2000-07-01	0.04648
2000-10-01	0.09000
2001-04-01	0.22459
2001-07-01	0.01923
2001-10-01	0.57889
2002-01-01	0.19390
2002-04-01	1.15645
2002-10-01	0.26832
2003-01-01	0.34668
2003-04-01	0.46238
2004-04-01	0.10000
2005-04-01	0.27844
2006-04-01	0.73369
2006-10-01	0.48328
2007-01-01	0.12976
2007-04-01	1.71646
2007-10-01	1.07459
2008-01-01	0.03000
2008-04-01	0.42041
2008-07-01	0.19640
2008-10-01	0.35225
2009-10-01	2.01657
2010-01-01	0.10162
2010-04-01	1.02890
2010-07-01	0.33200
2010-10-01	3.35000
2011-01-01	2.17500
2011-04-01	0.12114
2011-07-01	2.98000
2011-10-01	1.11285
2012-01-01	1.73362
2012-04-01	0.09298
2012-07-01	3.43727
2012-10-01	0.15364
2013-01-01	0.29791
2013-04-01	0.14400
2013-07-01	0.50628
2013-10-01	1.25422
2014-01-01	1.01517
2014-04-01	1.30380
2014-07-01	0.64100
2014-10-01	0.26992
2015-04-01	0.20941