Quarter	Billions of US Dollars
1968-04-01	0.00480
1971-01-01	0.01000
1972-01-01	0.01500
1972-04-01	0.00650
1972-10-01	0.01000
1973-07-01	0.00540
1973-10-01	0.01600
1974-04-01	0.00900
1974-10-01	0.01570
1975-07-01	0.00650
1975-10-01	0.01360
1976-01-01	0.01890
1976-07-01	0.01500
1976-10-01	0.00840
1977-01-01	0.04090
1977-04-01	0.01500
1977-07-01	0.01050
1977-10-01	0.01710
1978-01-01	0.02070
1978-07-01	0.00400
1979-01-01	0.01000
1980-10-01	0.01140
1981-01-01	0.03560
1981-04-01	0.00720
1982-01-01	0.01580
1982-04-01	0.05100
1982-10-01	0.05000
1983-01-01	0.02100
1983-04-01	0.02290
1983-10-01	0.02160
1984-01-01	0.01150
1985-04-01	0.14160
1985-07-01	0.08970
1985-10-01	0.20830
1986-04-01	0.15390
1986-07-01	0.05790
1986-10-01	0.06100
1987-01-01	0.12650
1987-04-01	0.04510
1987-10-01	0.04550
1988-01-01	0.03213
1988-04-01	0.14750
1988-07-01	0.04070
1988-10-01	0.18520
1989-01-01	0.13650
1989-04-01	0.10000
1989-07-01	0.05260
1989-10-01	0.09620
1990-01-01	0.12780
1990-04-01	0.04670
1990-07-01	0.00940
1990-10-01	0.15930
1991-01-01	0.07460
1991-04-01	0.31390
1991-07-01	0.18930
1991-10-01	0.03850
1992-01-01	0.43630
1992-04-01	0.20880
1992-07-01	0.22900
1992-10-01	0.05080
1993-01-01	0.35300
1993-04-01	0.36410
1993-07-01	0.34143
1993-10-01	0.39274
1994-01-01	0.26559
1994-04-01	0.15378
1994-07-01	0.16509
1994-10-01	0.09390
1995-01-01	0.16929
1995-04-01	0.14600
1995-07-01	0.09120
1995-10-01	0.17422
1996-01-01	0.41085
1996-04-01	0.25063
1996-07-01	0.24140
1996-10-01	0.03000
1997-01-01	0.21739
1997-04-01	0.37927
1997-07-01	0.16629
1997-10-01	0.13574
1998-01-01	0.10133
1998-04-01	0.51272
1998-07-01	0.20105
1998-10-01	0.66064
1999-01-01	0.85461
1999-04-01	0.29324
1999-07-01	0.27359
1999-10-01	0.32909
2000-01-01	0.98598
2000-04-01	0.52527
2000-07-01	0.20862
2000-10-01	1.03466
2001-01-01	1.40062
2001-04-01	1.13032
2001-07-01	0.05360
2001-10-01	0.37868
2002-01-01	0.39093
2002-04-01	0.58710
2002-07-01	0.23943
2002-10-01	0.11472
2003-01-01	0.32425
2003-04-01	1.79315
2003-07-01	1.33092
2003-10-01	1.54193
2004-01-01	3.14494
2004-04-01	3.54583
2004-07-01	3.03316
2004-10-01	3.45445
2005-01-01	5.52200
2005-04-01	6.79706
2005-07-01	5.89463
2005-10-01	4.40711
2006-01-01	3.71460
2006-04-01	2.97074
2006-07-01	7.18879
2006-10-01	4.14694
2007-01-01	6.43413
2007-04-01	4.34678
2007-07-01	1.88382
2007-10-01	3.22423
2008-01-01	3.42062
2008-04-01	5.04274
2008-07-01	0.58151
2008-10-01	0.01204
2009-01-01	0.13216
2009-04-01	0.71911
2009-07-01	1.28075
2009-10-01	1.54458
2010-01-01	2.07712
2010-04-01	2.14176
2010-07-01	0.82486
2010-10-01	0.05000
2011-01-01	0.55906
2011-04-01	3.06621
2011-07-01	0.13574
2012-01-01	0.00090
2012-04-01	1.00000
2012-07-01	0.00027
2012-10-01	0.00017
2013-01-01	0.00215
2013-04-01	0.23586
2013-07-01	0.21053
2013-10-01	0.10076
2014-01-01	0.06930
2014-04-01	0.18256
2014-07-01	0.99350
2015-01-01	0.40381
2015-04-01	0.08155