Year	Percent
1973-01-01	37.23010000000000
1974-01-01	37.77000000000000
1975-01-01	39.52310000000000
1976-01-01	41.07140000000000
1977-01-01	43.93790000000000
1978-01-01	61.82370000000000
1979-01-01	77.49150000000000
1980-01-01	77.74940000000000
1981-01-01	77.74980000000000
1982-01-01	78.27080000000000
1983-01-01	80.44760000000000
1984-01-01	82.12180000000000
1985-01-01	84.07760000000000
1986-01-01	85.02690000000000
1987-01-01	89.78680000000000
1988-01-01	90.90620000000000
1989-01-01	93.26830000000000
1990-01-01	97.39860000000000
1991-01-01	100.49000000000000
1992-01-01	100.89000000000000
1993-01-01	101.50600000000000
1994-01-01	98.27970000000000
1995-01-01	98.32820000000000
1996-01-01	99.16650000000000
1997-01-01	98.78440000000000
1998-01-01	98.78440000000000
1999-01-01	98.78440000000000
2000-01-01	101.48899999999999
2001-01-01	94.10420000000000
2002-01-01	92.92950000000000
2003-01-01	92.77830000000000
2004-01-01	92.14050000000000
2005-01-01	94.57940000000000
2006-01-01	97.66300000000000
2007-01-01	100.34500000000000
2008-01-01	106.41200000000000
2009-01-01	112.53000000000000
2010-01-01	112.24600000000001
2011-01-01	112.31900000000000
2012-01-01	113.78600000000000
2013-01-01	114.05799999999999
2014-01-01	113.02300000000000
2015-01-01	111.79400000000000
2016-01-01	112.46200000000000