Quarter	Percent
1978-03-31	6.94
1978-06-30	10.155
1978-09-30	9.75
1978-12-31	12.565
1979-03-31	12.125
1979-06-30	14.065
1979-09-30	14.16
1979-12-31	17.065
1980-03-31	18.565
1980-06-30	17.125
1980-09-30	15.94
1980-12-31	14.875
1981-03-31	12.595
1981-06-30	12.66
1981-09-30	16.875
1981-12-31	15.75
1982-03-31	13.625
1982-06-30	13.065
1982-09-30	10.565
1982-12-31	10.5
1983-03-31	10.845
1983-06-30	9.69
1983-09-30	9.66
1983-12-31	9.375
1984-03-31	8.97
1984-06-30	9.47
1984-09-30	10.78
1984-12-31	10.03
1985-03-31	13.155
1985-06-30	12.53
1985-09-30	11.565
1985-12-31	11.91
1986-03-31	11.345
1986-06-30	9.78
1986-09-30	10.94
1986-12-31	11.22
1987-03-31	9.94
1987-06-30	9.22
1987-09-30	10.315
1987-12-31	8.925
1988-03-31	8.66
1988-06-30	9.895
1988-09-30	11.925
1988-12-31	13.205
1989-03-31	13.045
1989-06-30	14.22
1989-09-30	14.66
1989-12-31	15.145
1990-03-31	15.235
1990-06-30	14.955
1990-09-30	14.955
1990-12-31	14.03
1991-03-31	12.41
1991-06-30	11.31
1991-09-30	10.325
1991-12-31	10.94
1992-03-31	10.81
1992-06-30	10.095
1992-09-30	8.97
1992-12-31	7
1993-03-31	5.94
1993-06-30	5.94
1993-09-30	5.985
1993-12-31	5.31
1994-03-31	5.31
1994-06-30	5.145
1994-09-30	5.83
1994-12-31	6.545
1995-03-31	6.61
1995-06-30	6.895
1995-09-30	6.765
1995-12-31	6.485
1996-03-31	6.03
1996-06-30	5.765
1996-09-30	5.86
1996-12-31	6.455
1997-03-31	6.295
1997-06-30	6.825
1997-09-30	7.235
1997-12-31	7.545
1998-03-31	7.515
1998-06-30	7.7969
1998-09-30	7.28
1998-12-31	6.175
1999-03-31	5.22
1999-06-30	5.11
1999-09-30	5.455
1999-12-31	5.9688
2000-03-31	6.1876
2000-06-30	6.1407
2000-09-30	6.1094
2000-12-31	5.8282
2001-03-31	5.4532
2001-06-30	5.2188
2001-09-30	4.4376
2001-12-31	4.0469
2002-03-31	4.125
2002-06-30	4.0781
2002-09-30	3.8906
2002-12-31	3.95
2003-03-31	3.59
2003-06-30	3.57
2003-09-30	3.665
2003-12-31	3.965
2004-03-31	4.315
2004-06-30	4.78
2004-09-30	4.84
2004-12-31	4.825
2005-03-31	4.915
2005-06-30	4.71
2005-09-30	4.535
2005-12-31	4.58
2006-03-31	4.55
2006-06-30	4.72
2006-09-30	5.035
2006-12-31	5.275
2007-03-31	5.57
2007-06-30	5.955
2007-09-30	6.23
2007-12-31	5.95
2008-03-31	5.985
2008-06-30	5.91
2008-09-30	6.225
2008-12-31	2.825
2009-03-31	1.65
2009-06-30	1.175
2009-09-30	0.575
2009-12-31	0.625
2010-03-31	0.6
2010-06-30	0.75
2010-09-30	0.75
2010-12-31	0.775
2011-03-31	0.8
2011-06-30	0.86
2011-09-30	1.005
2011-12-31	1.1
2012-03-31	1.06
2012-06-30	0.915
2012-09-30	0.61
2012-12-31	0.5
2013-03-31	0.485
2013-06-30	0.485
2013-09-30	0.495
2013-12-31	0.53
2014-03-31	0.53
2014-06-30	0.55
2014-09-30	0.555
2014-12-31	0.53
2015-03-31	0.53
2015-06-30	0.565
2015-09-30	0.57
2015-12-31	0.57
2016-03-31	0.565
2016-06-30	0.55
2016-09-30	0.37
2016-12-31	0.37
2017-03-31	0.33
2017-06-30	0.32
2017-09-30	0.33