Quarter	Billions of US Dollars
1972-04-01	0.03150
1972-10-01	0.02000
1973-10-01	0.03000
1975-04-01	0.01200
1975-10-01	0.01920
1976-04-01	0.02500
1976-07-01	0.06000
1976-10-01	0.07090
1977-01-01	0.06190
1977-07-01	0.03040
1977-10-01	0.06220
1978-01-01	0.02500
1979-01-01	0.02500
1981-01-01	0.07500
1981-07-01	-0.03000
1981-10-01	-0.02500
1982-04-01	-0.00405
1982-07-01	0.05843
1982-10-01	-0.01999
1983-01-01	-0.06653
1983-04-01	-0.02500
1983-10-01	0.05800
1984-07-01	-0.01500
1985-01-01	0.00390
1985-04-01	-0.02500
1985-10-01	0.04153
1986-01-01	-0.08571
1986-10-01	0.15514
1987-01-01	0.05000
1987-04-01	0.07500
1987-10-01	0.07300
1988-10-01	-0.07982
1989-01-01	-0.02519
1989-07-01	-0.06809
1989-10-01	-0.20000
1990-01-01	0.06792
1991-01-01	0.03510
1991-04-01	0.02000
1991-07-01	0.05000
1992-01-01	0.03900
1992-04-01	-0.05000
1992-10-01	-0.07500
1993-10-01	0.22500
1994-01-01	0.20000
1994-04-01	0.09670
1994-07-01	0.05000
1994-10-01	0.05000
1995-01-01	-0.07500
1995-04-01	0.03000
1995-07-01	0.04000
1995-10-01	0.02971
1996-01-01	-0.07242
1996-04-01	0.47471
1996-07-01	0.01542
1996-10-01	1.11322
1997-01-01	0.47999
1997-04-01	0.73930
1997-07-01	0.85921
1997-10-01	-0.00292
1998-01-01	-0.01212
1998-04-01	2.30791
1998-07-01	0.08000
1998-10-01	0.04389
1999-01-01	0.95505
1999-04-01	-0.16980
1999-07-01	0.99808
1999-10-01	1.05828
2000-01-01	0.39777
2000-04-01	3.07972
2000-07-01	0.50957
2000-10-01	0.45461
2001-01-01	1.48130
2001-04-01	-0.03086
2001-07-01	2.24613
2001-10-01	2.83148
2002-01-01	0.17074
2002-04-01	-1.45189
2002-07-01	-0.20591
2002-10-01	0.16619
2003-01-01	0.28933
2003-04-01	1.11422
2003-07-01	1.37628
2003-10-01	3.33902
2004-01-01	1.07054
2004-04-01	2.07248
2004-07-01	0.87122
2004-10-01	2.95249
2005-01-01	0.44882
2005-04-01	0.52570
2005-07-01	1.67059
2005-10-01	0.64502
2006-01-01	0.10483
2006-04-01	3.14443
2006-07-01	1.29893
2006-10-01	0.29468
2007-01-01	-0.49633
2007-04-01	3.04774
2007-07-01	0.70711
2007-10-01	0.92606
2008-01-01	0.68736
2008-04-01	0.78386
2008-07-01	1.89349
2008-10-01	-1.05522
2009-01-01	-1.78536
2009-04-01	-2.65635
2009-07-01	1.38242
2009-10-01	2.48494
2010-01-01	0.79506
2010-04-01	-1.13236
2010-07-01	3.37618
2010-10-01	0.50041
2011-01-01	1.39971
2011-04-01	1.15677
2011-07-01	-2.40794
2011-10-01	0.04782
2012-01-01	6.47246
2012-04-01	-1.32109
2012-07-01	8.24862
2012-10-01	4.96786
2013-01-01	2.89056
2013-04-01	0.85480
2013-07-01	0.95107
2013-10-01	-1.19079
2014-01-01	1.49110
2014-04-01	2.64511
2014-07-01	3.37174
2014-10-01	-4.26754
2015-01-01	0.24861
2015-04-01	1.62413