Quarter	Percent
1986-01-01	17.23000000000000
1986-04-01	14.88000000000000
1986-07-01	14.88000000000000
1986-10-01	13.32000000000000
1987-01-01	14.51000000000000
1987-04-01	15.66000000000000
1987-07-01	14.57000000000000
1987-10-01	12.91000000000000
1988-01-01	14.19000000000000
1988-04-01	14.50000000000000
1988-07-01	14.27000000000000
1988-10-01	11.28000000000000
1989-01-01	11.10000000000000
1989-04-01	11.37000000000000
1989-07-01	10.20000000000000
1989-10-01	9.53000000000000
1990-01-01	9.69000000000000
1990-04-01	10.12000000000000
1990-07-01	9.54000000000000
1990-10-01	9.23000000000000
1991-01-01	10.44000000000000
1991-04-01	9.96000000000000
1991-07-01	11.43000000000000
1991-10-01	9.41000000000000
1992-01-01	9.07000000000000
1992-04-01	8.44000000000000
1992-07-01	9.48000000000000
1992-10-01	8.89000000000000
1993-01-01	9.36000000000000
1993-04-01	8.64000000000000
1993-07-01	9.33000000000000
1993-10-01	8.79000000000000
1994-01-01	10.48000000000000
1994-04-01	10.35000000000000
1994-07-01	9.92000000000000
1994-10-01	10.33000000000000
1995-01-01	9.90000000000000
1995-04-01	9.84000000000000
1995-07-01	9.48000000000000
1995-10-01	8.86000000000000
1996-01-01	8.87000000000000
1996-04-01	8.15000000000000
1996-07-01	7.83000000000000
1996-10-01	6.68000000000000
1997-01-01	7.77000000000000
1997-04-01	8.06000000000000
1997-07-01	8.27000000000000
1997-10-01	6.56000000000000
1998-01-01	6.98000000000000
1998-04-01	7.66000000000000
1998-07-01	8.13000000000000
1998-10-01	7.67000000000000
1999-01-01	8.84000000000000
1999-04-01	11.77000000000000
1999-07-01	12.30000000000000
1999-10-01	10.48000000000000
2000-01-01	10.20000000000000
2000-04-01	10.10000000000000
2000-07-01	11.68000000000000
2000-10-01	9.37000000000000
2001-01-01	10.39000000000000
2001-04-01	10.38000000000000
2001-07-01	10.81000000000000
2001-10-01	8.84000000000000
2002-01-01	10.58000000000000
2002-04-01	10.48000000000000
2002-07-01	10.42000000000000
2002-10-01	9.10000000000000
2003-01-01	10.48000000000000
2003-04-01	10.96000000000000
2003-07-01	10.97000000000000
2003-10-01	8.89000000000000
2004-01-01	10.42000000000000
2004-04-01	11.95000000000000
2004-07-01	12.19000000000000
2004-10-01	10.27000000000000
2005-01-01	10.97000000000000
2005-04-01	11.33000000000000
2005-07-01	10.91000000000000
2005-10-01	9.15000000000000
2006-01-01	10.57000000000000
2006-04-01	10.96000000000000
2006-07-01	9.48000000000000
2006-10-01	6.96000000000000
2007-01-01	8.53000000000000
2007-04-01	8.00000000000000
2007-07-01	9.05000000000000
2007-10-01	8.84000000000000
2008-01-01	9.59000000000000
2008-04-01	10.24000000000000
2008-07-01	9.53000000000000
2008-10-01	8.68000000000000
2009-01-01	10.90000000000000
2009-04-01	11.40000000000000
2009-07-01	11.10000000000000
2009-10-01	9.40000000000000
2010-01-01	10.80000000000000
2010-04-01	10.10000000000000
2010-07-01	9.10000000000000
2010-10-01	8.60000000000000
2011-01-01	8.90000000000000
2011-04-01	8.80000000000000
2011-07-01	8.80000000000000
2011-10-01	8.20000000000000
2012-01-01	8.60000000000000
2012-04-01	7.71111484596326
2012-07-01	8.01922163073162
2012-10-01	7.26070512215051
2013-01-01	7.48260067515422
2013-04-01	7.09097448788094
2013-07-01	6.44872177745593
2013-10-01	6.50823464326535
2014-01-01	7.11805572062487
2014-04-01	6.77925543433240
2014-07-01	7.08306167286785
2014-10-01	6.59136841484361
2015-01-01	7.25238375657071
2015-04-01	7.37600115730553
2015-07-01	6.92995554061358
2015-10-01	5.79991131981918
2016-01-01	7.21766699893789
2016-04-01	7.27014373047231
2016-07-01	7.20258785093690
2016-10-01	6.38653887640588
2017-01-01	7.53937226213178
2017-04-01	7.56529776641584
2017-07-01	6.89841682080593
2017-10-01	6.84477210562895
2018-01-01	7.91066081497183
2018-04-01	7.94142341087889
2018-07-01	7.42818531098903