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	0.08690
1975-07-01	0.28570
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	0.09594
1979-04-01	0.15190
1979-07-01	0.15725
1979-10-01	-0.00032
1980-04-01	0.09438
1980-07-01	-0.01159
1980-10-01	0.02500
1981-01-01	0.09670
1981-04-01	0.11430
1981-07-01	-0.00620
1981-10-01	0.24905
1982-01-01	0.44348
1982-04-01	0.17995
1982-07-01	0.03242
1982-10-01	0.48550
1983-01-01	0.22221
1983-04-01	-0.12633
1983-07-01	-0.03784
1984-01-01	0.13550
1984-04-01	0.10499
1984-07-01	0.08378
1984-10-01	0.66564
1985-01-01	0.06810
1985-04-01	0.23716
1985-07-01	0.73720
1985-10-01	0.06651
1986-01-01	0.55304
1986-04-01	0.58975
1986-07-01	1.25095
1986-10-01	0.54782
1987-01-01	0.77676
1987-04-01	0.69597
1987-07-01	0.06609
1987-10-01	0.36614
1988-01-01	-0.25382
1988-04-01	0.95121
1988-07-01	-0.16741
1988-10-01	0.08879
1989-01-01	-0.47185
1989-04-01	-0.03448
1989-07-01	0.07478
1989-10-01	0.19811
1990-01-01	-0.16240
1990-04-01	0.26410
1990-07-01	-0.06614
1990-10-01	-0.29931
1991-01-01	-0.07555
1991-04-01	-0.09838
1991-07-01	-0.15323
1991-10-01	-1.04426
1992-01-01	-0.13820
1992-04-01	-1.51136
1992-07-01	-0.52407
1992-10-01	-0.41251
1993-01-01	-0.92855
1993-04-01	-0.49780
1993-07-01	-0.11445
1993-10-01	-0.36672
1994-01-01	-0.15919
1994-04-01	0.07156
1994-07-01	-0.62056
1994-10-01	0.16884
1995-01-01	-0.52723
1995-04-01	-0.38133
1995-07-01	-0.34227
1995-10-01	0.15355
1996-01-01	-0.00466
1996-04-01	-0.13286
1996-07-01	-0.40459
1996-10-01	-0.36390
1997-01-01	-0.40232
1997-04-01	0.06856
1997-07-01	0.26592
1997-10-01	-0.02672
1998-01-01	0.61952
1998-04-01	-0.01681
1998-07-01	-0.11639
1998-10-01	-0.55494
1999-01-01	0.32990
1999-04-01	-0.35032
1999-07-01	-0.20254
1999-10-01	-0.04783
2000-01-01	-0.14617
2000-04-01	0.53695
2000-07-01	-0.30521
2000-10-01	-0.16927
2001-01-01	-0.10586
2001-04-01	0.22459
2001-07-01	0.01923
2001-10-01	0.31743
2002-01-01	-0.04703
2002-04-01	0.82237
2002-07-01	-0.25666
2002-10-01	0.06201
2003-01-01	0.04325
2003-04-01	0.18554
2003-07-01	-0.09191
2004-01-01	-0.30000
2004-04-01	-0.19191
2004-10-01	-0.37500
2005-01-01	-0.15000
2005-04-01	-0.53907
2005-10-01	-0.32258
2006-01-01	-0.33371
2006-04-01	0.20369
2006-10-01	0.18328
2007-01-01	-0.27536
2007-04-01	1.00236
2007-07-01	-0.21215
2007-10-01	1.06398
2008-01-01	-0.43949
2008-04-01	-0.23839
2008-07-01	0.10328
2008-10-01	0.03914
2009-01-01	-0.12500
2009-04-01	-0.11042
2009-10-01	1.99157
2010-01-01	0.10162
2010-04-01	0.64775
2010-07-01	0.18200
2010-10-01	3.35000
2011-01-01	1.93492
2011-04-01	-0.09137
2011-07-01	2.60000
2011-10-01	0.95883
2012-01-01	1.59923
2012-04-01	-0.25551
2012-07-01	1.48017
2012-10-01	0.03035
2013-01-01	0.10815
2013-04-01	-0.08156
2013-07-01	0.48796
2013-10-01	0.07681
2014-01-01	-4.05621
2014-04-01	1.09970
2014-07-01	0.13590
2014-10-01	0.11109
2015-01-01	0.07500
2015-04-01	0.05941