Month	Percent
1981-01-01	6.49000
1981-02-01	7.36000
1981-03-01	7.54000
1981-04-01	7.74000
1981-05-01	8.54000
1981-06-01	9.20000
1981-07-01	10.37000
1981-08-01	11.27000
1981-09-01	11.30000
1981-10-01	11.51000
1981-11-01	12.16000
1981-12-01	13.20000
1982-01-01	14.27000
1982-02-01	15.18000
1982-03-01	15.79000
1982-04-01	15.73000
1982-05-01	15.87000
1982-06-01	16.07000
1982-07-01	16.43000
1982-08-01	16.24000
1982-09-01	16.29000
1982-10-01	15.75000
1982-11-01	14.90000
1982-12-01	14.44000
1983-01-01	13.12000
1983-02-01	10.73000
1983-03-01	9.78000
1983-04-01	11.21000
1983-05-01	11.25000
1983-06-01	12.55000
1983-07-01	13.80000
1983-08-01	15.19000
1983-09-01	14.96000
1983-10-01	15.15000
1983-11-01	15.62000
1983-12-01	17.33000
1984-01-01	17.68000
1984-02-01	17.68000
1984-03-01	17.74000
1984-04-01	17.78000
1984-05-01	17.81000
1984-06-01	17.61000
1984-07-01	18.45000
1984-08-01	21.50000
1984-09-01	21.77000
1984-10-01	21.77000
1984-11-01	21.18000
1984-12-01	20.71000
1985-01-01	21.89000
1985-02-01	21.90000
1985-03-01	21.77000
1985-04-01	21.02000
1985-05-01	19.76000
1985-06-01	17.42000
1985-07-01	16.57000
1985-08-01	16.73000
1985-09-01	15.22000
1985-10-01	14.34000
1985-11-01	13.02000
1985-12-01	13.01000
1986-01-01	12.28000
1986-02-01	12.05000
1986-03-01	12.00000
1986-04-01	11.47000
1986-05-01	11.01000
1986-06-01	10.89000
1986-07-01	10.66000
1986-08-01	9.94000
1986-09-01	9.19000
1986-10-01	9.28000
1986-11-01	8.98000
1986-12-01	8.46000
1987-01-01	8.90000
1987-02-01	8.83000
1987-03-01	8.65000
1987-04-01	8.64000
1987-05-01	8.80000
1987-06-01	8.70000
1987-07-01	8.83000
1987-08-01	8.72000
1987-09-01	8.74000
1987-10-01	8.74000
1987-11-01	8.72000
1987-12-01	9.15000
1988-01-01	9.48000
1988-02-01	9.82000
1988-03-01	10.49000
1988-04-01	10.87000
1988-05-01	11.84000
1988-06-01	12.00000
1988-07-01	12.17000
1988-08-01	12.78000
1988-09-01	13.27000
1988-10-01	13.70000
1988-11-01	14.96000
1988-12-01	15.53000
1989-01-01	15.29000
1989-02-01	15.40000
1989-03-01	16.26000
1989-04-01	16.44000
1989-05-01	17.17000
1989-06-01	17.31000
1989-07-01	17.20000
1989-08-01	17.16000
1989-09-01	17.20000
1989-10-01	17.78000
1989-11-01	18.00000
1989-12-01	18.00000
1990-01-01	18.00000
1990-02-01	18.00000
1990-03-01	17.96000
1990-04-01	17.99000
1990-05-01	18.00000
1990-06-01	17.98000
1990-07-01	17.86000
1990-08-01	17.68000
1990-09-01	17.54000
1990-10-01	17.54000
1990-11-01	17.71000
1990-12-01	17.41000
1991-01-01	17.30000
1991-02-01	17.14000
1991-03-01	16.95000
1991-04-01	16.81000
1991-05-01	16.66000
1991-06-01	16.68000
1991-07-01	16.71000
1991-08-01	16.68000
1991-09-01	16.57000
1991-10-01	16.39000
1991-11-01	16.23000
1991-12-01	16.15000
1992-01-01	16.03000
1992-02-01	15.86000
1992-03-01	15.49000
1992-04-01	15.02000
1992-05-01	14.43000
1992-06-01	14.02000
1992-07-01	13.47000
1992-08-01	12.72000
1992-09-01	12.06000
1992-10-01	12.09000
1992-11-01	12.02000
1992-12-01	12.04000
1993-01-01	11.86000
1993-02-01	11.39000
1993-03-01	11.34000
1993-04-01	11.14000
1993-05-01	11.50000
1993-06-01	11.88000
1993-07-01	11.76000
1993-08-01	11.69000
1993-09-01	11.61000
1993-10-01	11.29000
1993-11-01	10.21000
1993-12-01	10.19000
1994-01-01	10.15000
1994-02-01	10.16000
1994-03-01	10.13000
1994-04-01	10.31000
1994-05-01	10.69000
1994-06-01	10.85000
1994-07-01	10.74000
1994-08-01	10.75000
1994-09-01	10.84000
1994-10-01	11.78000
1994-11-01	12.19000
1994-12-01	12.47000
1995-01-01	12.70000
1995-02-01	12.90000
1995-03-01	13.01000
1995-04-01	12.96000
1995-05-01	13.72000
1995-06-01	13.81000
1995-07-01	13.98000
1995-08-01	13.87000
1995-09-01	13.99000
1995-10-01	13.83000
1995-11-01	13.63000
1995-12-01	13.94000
1996-01-01	14.02000
1996-02-01	13.92000
1996-03-01	14.14000
1996-04-01	14.30000
1996-05-01	15.87000
1996-06-01	15.80000
1996-07-01	15.02000
1996-08-01	15.88000
1996-09-01	15.28000
1996-10-01	15.02000
1996-11-01	15.26000
1996-12-01	15.93000
1997-01-01	16.23000
1997-02-01	15.79000
1997-03-01	15.81000
1997-04-01	15.77000
1997-05-01	15.68000
1997-06-01	15.46000
1997-07-01	15.08000
1997-08-01	14.79000
1997-09-01	14.72000
1997-10-01	14.56000
1997-11-01	14.55000
1997-12-01	14.65000
1998-01-01	14.43000
1998-02-01	14.02000
1998-03-01	13.22000
1998-04-01	12.90000
1998-05-01	13.02000
1998-06-01	16.04000
1998-07-01	18.99000
1998-08-01	19.74000
1998-09-01	21.64000
1998-10-01	19.45000
1998-11-01	17.76000
1998-12-01	17.20000
1999-01-01	16.40000
1999-02-01	15.54000
1999-03-01	14.62000
1999-04-01	13.75000
1999-05-01	13.52000
1999-06-01	13.26000
1999-07-01	12.10000
1999-08-01	11.68000
1999-09-01	11.17000
1999-10-01	10.76000
1999-11-01	10.71000
1999-12-01	10.70000
2000-01-01	10.16000
2000-02-01	9.78000
2000-03-01	9.85000
2000-04-01	9.88000
2000-05-01	10.22000
2000-06-01	10.28000
2000-07-01	10.23000
2000-08-01	10.15000
2000-09-01	10.16000
2000-10-01	10.19000
2000-11-01	10.22000
2000-12-01	10.20000
2001-01-01	10.15000
2001-02-01	10.12000
2001-03-01	10.17000
2001-04-01	10.34000
2001-05-01	10.38000
2001-06-01	9.99000
2001-07-01	9.53000
2001-08-01	9.37000
2001-09-01	9.24000
2001-10-01	8.87000
2001-11-01	8.76000
2001-12-01	9.20000
2002-01-01	9.44000
2002-02-01	9.43000
2002-03-01	9.92000
2002-04-01	10.60000
2002-05-01	11.16000
2002-06-01	11.44000
2002-07-01	11.37000
2002-08-01	11.43000
2002-09-01	12.11000
2002-10-01	12.61000
2002-11-01	12.17000
2002-12-01	12.27000
2003-01-01	12.34000
2003-02-01	12.63000
2003-03-01	12.73000
2003-04-01	12.74000
2003-05-01	12.55000
2003-06-01	11.21000
2003-07-01	10.89000
2003-08-01	10.25000
2003-09-01	9.42000
2003-10-01	8.22000
2003-11-01	7.69000
2003-12-01	7.31000
2004-01-01	7.60000
2004-02-01	7.51000
2004-03-01	7.72000
2004-04-01	7.77000
2004-05-01	7.71000
2004-06-01	7.83000
2004-07-01	7.89000
2004-08-01	7.44000
2004-09-01	7.12000
2004-10-01	7.28000
2004-11-01	7.25000
2004-12-01	7.27000
2005-01-01	7.28000
2005-02-01	7.23000
2005-03-01	7.20000
2005-04-01	6.95000
2005-05-01	6.75000
2005-06-01	6.76000
2005-07-01	6.73000
2005-08-01	6.72000
2005-09-01	6.74000
2005-10-01	6.79000
2005-11-01	6.89000
2005-12-01	6.82000
2006-01-01	6.74000
2006-02-01	6.68000
2006-03-01	6.53000
2006-04-01	6.65000
2006-05-01	6.80000
2006-06-01	7.11000
2006-07-01	7.28000
2006-08-01	7.69000
2006-09-01	7.75000
2006-10-01	8.22000
2006-11-01	8.23000
2006-12-01	8.39000
2007-01-01	8.70000
2007-02-01	8.66000
2007-03-01	8.28000
2007-04-01	8.28000
2007-05-01	8.50000
2007-06-01	9.02000
2007-07-01	9.03000
2007-08-01	9.13000
2007-09-01	9.31000
2007-10-01	9.77000
2007-11-01	10.22000
2007-12-01	10.48000
2008-01-01	10.37000
2008-02-01	10.28000
2008-03-01	10.14000
2008-04-01	10.25000
2008-05-01	11.55000
2008-06-01	11.47000
2008-07-01	11.37000
2008-08-01	11.34000
2008-09-01	11.14000
2008-10-01	10.91000
2008-11-01	10.80000
2008-12-01	10.87000
2009-01-01	10.65620
2009-02-01	9.22420
2009-03-01	8.62240
2009-04-01	8.28000
2009-05-01	7.67880
2009-06-01	7.22640
2009-07-01	7.38670
2009-08-01	7.16160
2009-09-01	6.93920
2009-10-01	6.94192
2009-11-01	7.01000
2009-12-01	7.07000
2010-01-01	7.11000
2010-02-01	7.08000
2010-03-01	6.95000
2010-04-01	6.59000
2010-05-01	6.58000
2010-06-01	6.54000
2010-07-01	6.48000
2010-08-01	6.42000
2010-09-01	6.08000
2010-10-01	5.97000
2010-11-01	5.65000
2010-12-01	5.59000
2011-01-01	5.54000
2011-02-01	5.53000
2011-03-01	5.50000
2011-04-01	5.46000
2011-05-01	5.45000
2011-06-01	5.46000
2011-07-01	5.49000
2011-08-01	5.49000
2011-09-01	5.49000
2011-10-01	5.49000
2011-11-01	5.49000
2011-12-01	5.45000
2012-01-01	5.47000
2012-02-01	5.50000
2012-03-01	5.54000
2012-04-01	5.57000
2012-05-01	5.56000
2012-06-01	5.58000
2012-07-01	5.38000
2012-08-01	5.05000
2012-09-01	4.94000
2012-10-01	4.94000
2012-11-01	4.93000
2012-12-01	4.99000
2013-01-01	5.06000
2013-02-01	5.04000
2013-03-01	5.05000
2013-04-01	5.11000
2013-05-01	5.03000
2013-06-01	5.12000
2013-07-01	5.12000
2013-08-01	5.09000
2013-09-01	5.06000
2013-10-01	5.04000
2013-11-01	5.07000
2013-12-01	5.14000
2014-01-01	5.23000
2014-02-01	5.56000
2014-03-01	5.73000
2014-04-01	5.73000
2014-05-01	5.74000
2014-06-01	5.79000
2014-07-01	6.03000
2014-08-01	6.01000
2014-09-01	6.00000
2014-10-01	5.90000
2014-11-01	5.83000
2014-12-01	6.04000
2015-01-01	6.01000
2015-02-01	5.89000
2015-03-01	5.80000
2015-04-01	5.79000
2015-05-01	5.72000
2015-06-01	5.76000
2015-07-01	6.03000
2015-08-01	6.16000
2015-09-01	6.24000
2015-10-01	6.15000
2015-11-01	6.33000
2015-12-01	6.74000
2016-01-01	6.86000
2016-02-01	6.93000
2016-03-01	7.04000
2016-04-01	7.18000
2016-05-01	7.16000
2016-06-01	7.19000
2016-07-01	7.35000
2016-08-01	7.30000
2016-09-01	7.29000
2016-10-01	7.34000
2016-11-01	7.48000
2016-12-01	7.61000
2017-01-01	7.46000
2017-02-01	7.26000
2017-03-01	7.23000
2017-04-01	7.41000
2017-05-01	7.43000
2017-06-01	7.34000
2017-07-01	7.33000
2017-08-01	7.17000
2017-09-01	7.10000
2017-10-01	7.25000
2017-11-01	7.45000
2017-12-01	7.54000
2018-01-01	7.32000
2018-02-01	7.12000
2018-03-01	7.06000
2018-04-01	6.98000
2018-05-01	7.01000
2018-06-01	7.03000
2018-07-01	7.07000
2018-08-01	7.12000
2018-09-01	7.14000
2018-10-01	7.19000