Quarter	Percent
1978-03-31	7.44
1978-06-30	10.435
1978-09-30	10.065
1978-12-31	12.625
1979-03-31	11.535
1979-06-30	13.435
1979-09-30	13.94
1979-12-31	16.565
1980-03-31	18.095
1980-06-30	15.815
1980-09-30	15.22
1980-12-31	14.47
1981-03-31	12.44
1981-06-30	12.875
1981-09-30	16.935
1981-12-31	15.72
1982-03-31	13.625
1982-06-30	13.125
1982-09-30	10.565
1982-12-31	10.44
1983-03-31	10.875
1983-06-30	10.065
1983-09-30	9.75
1983-12-31	9.695
1984-03-31	9.255
1984-06-30	10.565
1984-09-30	10.81
1984-12-31	10.22
1985-03-31	12.375
1985-06-30	12.315
1985-09-30	11.19
1985-12-31	11.91
1986-03-31	10.78
1986-06-30	9.66
1986-09-30	11.375
1986-12-31	11.19
1987-03-31	9.75
1987-06-30	9.25
1987-09-30	10.375
1987-12-31	9.065
1988-03-31	8.815
1988-06-30	10
1988-09-30	11.785
1988-12-31	13.095
1989-03-31	13.03
1989-06-30	14.28
1989-09-30	14.66
1989-12-31	15.09
1990-03-31	15.41
1990-06-30	14.94
1990-09-30	14.91
1990-12-31	13.375
1991-03-31	11.91
1991-06-30	11.03
1991-09-30	10.16
1991-12-31	10.97
1992-03-31	10.985
1992-06-30	10.09
1992-09-30	8.81
1992-12-31	6.88
1993-03-31	5.88
1993-06-30	5.925
1993-09-30	5.83
1993-12-31	5.265
1994-03-31	5.47
1994-06-30	5.455
1994-09-30	6.44
1994-12-31	7.075
1995-03-31	6.97
1995-06-30	7.11
1995-09-30	6.78
1995-12-31	6.345
1996-03-31	6.13
1996-06-30	5.795
1996-09-30	5.955
1996-12-31	6.66
1997-03-31	6.56
1997-06-30	6.97
1997-09-30	7.3594
1997-12-31	7.595
1998-03-31	7.5313
1998-06-30	7.8594
1998-09-30	7.125
1998-12-31	5.825
1999-03-31	5.125
1999-06-30	5.16
1999-09-30	5.895
1999-12-31	6.2188
2000-03-31	6.3751
2000-06-30	6.2657
2000-09-30	6.2032
2000-12-31	5.7813
2001-03-31	5.2813
2001-06-30	5.3438
2001-09-30	4.3907
2001-12-31	4.0469
2002-03-31	4.3438
2002-06-30	4.25
2002-09-30	3.875
2002-12-31	3.915
2003-03-31	3.53
2003-06-30	3.515
2003-09-30	3.765
2003-12-31	4.11
2004-03-31	4.47
2004-06-30	4.98
2004-09-30	4.935
2004-12-31	4.85
2005-03-31	4.965
2005-06-30	4.645
2005-09-30	4.505
2005-12-31	4.53
2006-03-31	4.6
2006-06-30	4.76
2006-09-30	5.14
2006-12-31	5.385
2007-03-31	5.675
2007-06-30	6.075
2007-09-30	6.25
2007-12-31	5.86
2008-03-31	5.955
2008-06-30	6.11
2008-09-30	6.325
2008-12-31	3
2009-03-31	1.85
2009-06-30	1.425
2009-09-30	0.75
2009-12-31	0.825
2010-03-31	0.85
2010-06-30	1.02
2010-09-30	1.02
2010-12-31	1.045
2011-03-31	1.1
2011-06-30	1.13
2011-09-30	1.275
2011-12-31	1.395
2012-03-31	1.37
2012-06-30	1.195
2012-09-30	0.85
2012-12-31	0.665
2013-03-31	0.59
2013-06-30	0.575
2013-09-30	0.585
2013-12-31	0.585
2014-03-31	0.605
2014-06-30	0.675
2014-09-30	0.685
2014-12-31	0.675
2015-03-31	0.675
2015-06-30	0.79
2015-09-30	0.79
2015-12-31	0.79
2016-03-31	0.79
2016-06-30	0.785
2016-09-30	0.55
2016-12-31	0.565
2017-03-31	0.505
2017-06-30	0.49
2017-09-30	0.52