Quarter	Percent
1986-01-01	13.35000000000000
1986-04-01	12.57000000000000
1986-07-01	12.13000000000000
1986-10-01	10.41000000000000
1987-01-01	10.60000000000000
1987-04-01	11.88000000000000
1987-07-01	11.65000000000000
1987-10-01	9.58000000000000
1988-01-01	10.02000000000000
1988-04-01	10.71000000000000
1988-07-01	10.32000000000000
1988-10-01	7.96000000000000
1989-01-01	7.85000000000000
1989-04-01	8.57000000000000
1989-07-01	8.08000000000000
1989-10-01	7.11000000000000
1990-01-01	7.07000000000000
1990-04-01	8.23000000000000
1990-07-01	8.31000000000000
1990-10-01	7.42000000000000
1991-01-01	7.90000000000000
1991-04-01	8.35000000000000
1991-07-01	9.29000000000000
1991-10-01	7.08000000000000
1992-01-01	6.75000000000000
1992-04-01	6.64000000000000
1992-07-01	7.08000000000000
1992-10-01	6.19000000000000
1993-01-01	6.33000000000000
1993-04-01	6.48000000000000
1993-07-01	6.96000000000000
1993-10-01	6.40000000000000
1994-01-01	7.05000000000000
1994-04-01	7.96000000000000
1994-07-01	8.49000000000000
1994-10-01	7.76000000000000
1995-01-01	7.34000000000000
1995-04-01	7.72000000000000
1995-07-01	7.59000000000000
1995-10-01	6.56000000000000
1996-01-01	6.57000000000000
1996-04-01	6.57000000000000
1996-07-01	6.77000000000000
1996-10-01	5.39000000000000
1997-01-01	5.83000000000000
1997-04-01	6.60000000000000
1997-07-01	6.69000000000000
1997-10-01	5.34000000000000
1998-01-01	5.29000000000000
1998-04-01	6.13000000000000
1998-07-01	6.86000000000000
1998-10-01	7.30000000000000
1999-01-01	8.37000000000000
1999-04-01	11.13000000000000
1999-07-01	11.77000000000000
1999-10-01	9.28000000000000
2000-01-01	8.59000000000000
2000-04-01	9.85000000000000
2000-07-01	11.34000000000000
2000-10-01	8.89000000000000
2001-01-01	9.49000000000000
2001-04-01	10.39000000000000
2001-07-01	10.89000000000000
2001-10-01	8.64000000000000
2002-01-01	9.60000000000000
2002-04-01	10.30000000000000
2002-07-01	10.63000000000000
2002-10-01	8.69000000000000
2003-01-01	9.21000000000000
2003-04-01	10.08000000000000
2003-07-01	10.42000000000000
2003-10-01	8.45000000000000
2004-01-01	9.17000000000000
2004-04-01	10.91000000000000
2004-07-01	11.08000000000000
2004-10-01	8.87000000000000
2005-01-01	9.07000000000000
2005-04-01	10.10000000000000
2005-07-01	9.83000000000000
2005-10-01	7.94000000000000
2006-01-01	8.35000000000000
2006-04-01	8.93000000000000
2006-07-01	7.92000000000000
2006-10-01	6.00000000000000
2007-01-01	6.73000000000000
2007-04-01	6.87000000000000
2007-07-01	7.71000000000000
2007-10-01	7.21000000000000
2008-01-01	7.55000000000000
2008-04-01	8.39000000000000
2008-07-01	7.76000000000000
2008-10-01	7.47000000000000
2009-01-01	9.20000000000000
2009-04-01	10.70000000000000
2009-07-01	10.20000000000000
2009-10-01	8.60000000000000
2010-01-01	9.00000000000000
2010-04-01	8.50000000000000
2010-07-01	8.00000000000000
2010-10-01	7.10000000000000
2011-01-01	7.30000000000000
2011-04-01	7.20000000000000
2011-07-01	7.40000000000000
2011-10-01	6.60000000000000
2012-01-01	6.60000000000000
2012-04-01	6.57222515934442
2012-07-01	6.50401718154451
2012-10-01	6.05446045145645
2013-01-01	6.20344831275753
2013-04-01	6.16893216652344
2013-07-01	5.69026334283899
2013-10-01	5.66686663825315
2014-01-01	6.45066994866070
2014-04-01	6.45093794790865
2014-07-01	6.63531176470188
2014-10-01	6.02869446550228
2015-01-01	6.13100295575144
2015-04-01	6.51635186405057
2015-07-01	6.42325548917390
2015-10-01	5.78426434566424
2016-01-01	6.26318633602344
2016-04-01	6.87708995768557
2016-07-01	6.75105963630345
2016-10-01	6.06871397338466
2017-01-01	6.61056168632414
2017-04-01	7.01950096828788
2017-07-01	6.70324795747083
2017-10-01	6.36144330938435
2018-01-01	6.90407843942372
2018-04-01	7.15043170763290
2018-07-01	7.08021240086775