Quarter	Percent
1973-04-01	6.4800
1973-07-01	9.1700
1973-10-01	11.7500
1974-01-01	6.6280
1974-04-01	14.9580
1974-07-01	10.3170
1974-10-01	5.5690
1975-01-01	6.3950
1975-04-01	5.4330
1975-07-01	6.6920
1975-10-01	8.3280
1976-01-01	6.7620
1976-04-01	12.0730
1976-07-01	8.1620
1976-10-01	8.2820
1977-01-01	12.3980
1977-04-01	8.2950
1977-07-01	16.4350
1977-10-01	7.7780
1978-01-01	1.9090
1978-04-01	18.0260
1978-07-01	27.5420
1978-10-01	16.4920
1979-01-01	12.7830
1979-04-01	10.0740
1979-07-01	11.8710
1979-10-01	10.7540
1980-01-01	16.6530
1980-04-01	15.2100
1980-07-01	14.3400
1980-10-01	18.5980
1981-01-01	12.9150
1981-04-01	18.5330
1981-07-01	17.3610
1981-10-01	18.7310
1982-01-01	15.1810
1982-04-01	22.3440
1982-07-01	13.7830
1982-10-01	20.3050
1983-01-01	17.6760
1983-04-01	20.1350
1983-07-01	20.6860
1983-10-01	16.9870
1984-01-01	14.7710
1984-04-01	11.9080
1984-07-01	12.5130
1984-10-01	12.1810
1985-01-01	12.0710
1985-04-01	14.0190
1985-07-01	11.0570
1985-10-01	9.9400
1986-01-01	11.2550
1986-04-01	12.0330
1986-07-01	11.5800
1986-10-01	11.7570
1987-01-01	14.4250
1987-04-01	18.1220
1987-07-01	17.4520
1987-10-01	13.9990
1988-01-01	11.3960
1988-04-01	10.4740
1988-07-01	10.5790
1988-10-01	12.3990
1989-01-01	13.8920
1989-04-01	14.4220
1989-07-01	14.9850
1989-10-01	15.4870
1990-01-01	14.7850
1990-04-01	14.7420
1990-07-01	14.6550
1990-10-01	14.9130
1991-01-01	14.0830
1991-04-01	12.6630
1991-07-01	12.5920
1991-10-01	12.6430
1992-01-01	12.3660
1992-04-01	12.3790
1992-07-01	13.0300
1992-10-01	15.1040
1993-01-01	15.6660
1993-04-01	11.6360
1993-07-01	10.1900
1993-10-01	9.1370
1994-01-01	8.1660
1994-04-01	7.5170
1994-07-01	7.3580
1994-10-01	7.4730
1995-01-01	8.6520
1995-04-01	9.3990
1995-07-01	9.3350
1995-10-01	9.4130
1996-01-01	8.5100
1996-04-01	7.3090
1996-07-01	7.3300
1996-10-01	6.5500
1997-01-01	5.8300
1997-04-01	5.3400
1997-07-01	5.3100
1997-10-01	4.8900
1998-01-01	4.5900
1998-04-01	4.3300
1998-07-01	4.4700
1998-10-01	3.0000
1999-01-01	2.9252
1999-04-01	2.5632
1999-07-01	2.4336
1999-10-01	3.0418
2000-01-01	3.5104
2000-04-01	4.2945
2000-07-01	4.5905
2000-10-01	4.8268
2001-01-01	4.7814
2001-04-01	4.5395
2001-07-01	3.9865
2001-10-01	3.3389
2002-01-01	3.2640
2002-04-01	3.3485
2002-07-01	3.3186
2002-10-01	3.0945
2003-01-01	2.7490
2003-04-01	2.2133
2003-07-01	2.0209
2003-10-01	2.0567
2004-01-01	2.0057
2004-04-01	2.0277
2004-07-01	2.0518
2004-10-01	2.0535
2005-01-01	2.0567
2005-04-01	2.0623
2005-07-01	2.0941
2005-10-01	2.2757
2006-01-01	2.5200
2006-04-01	2.6977
2006-07-01	3.0410
2006-10-01	3.5011
2007-01-01	3.6909
2007-04-01	3.9557
2007-07-01	4.0286
2007-10-01	3.8791
2008-01-01	4.0910
2008-04-01	4.0067
2008-07-01	4.2733
2008-10-01	2.4864
2009-01-01	1.0620
2009-04-01	0.6980
2009-07-01	0.3632
2009-10-01	0.3546
2010-01-01	0.3477
2010-04-01	0.3543
2010-07-01	0.4536
2010-10-01	0.4981
2011-01-01	0.6587
2011-04-01	1.1240
2011-07-01	1.0055
2011-10-01	0.6270
2012-01-01	0.3567
2012-04-01	0.3320
2012-07-01	0.0993
2012-10-01	0.0734
2013-01-01	0.0670
2013-04-01	0.0862
2013-07-01	0.0803
2013-10-01	0.1686
2014-01-01	0.1919
2014-04-01	0.0758
2014-07-01	0.0066
2014-10-01	-0.0301
2015-01-01	-0.0504
2015-04-01	-0.1185
2015-07-01	-0.1357
2015-10-01	-0.1990
2016-01-01	-0.2877
2016-04-01	-0.3325
2016-07-01	-0.3430
2016-10-01	-0.3504
2017-01-01	-0.3535
2017-04-01	-0.3587
2017-07-01	-0.3581
2017-10-01	-0.3423
2018-01-01	-0.3639
2018-04-01	-0.3618
2018-07-01	-0.3627