Year	Percent
1960-01-01	70.33970000000000
1961-01-01	71.68880000000000
1962-01-01	72.82710000000000
1963-01-01	75.84870000000000
1964-01-01	78.85230000000000
1965-01-01	81.38720000000000
1966-01-01	81.30680000000000
1967-01-01	82.85430000000000
1968-01-01	83.85420000000000
1969-01-01	84.15480000000000
1970-01-01	85.01010000000000
1971-01-01	85.76200000000000
1972-01-01	89.10870000000000
1973-01-01	90.27630000000000
1974-01-01	90.31510000000000
1975-01-01	87.53900000000000
1976-01-01	85.47180000000000
1977-01-01	85.94960000000000
1978-01-01	85.89350000000000
1979-01-01	87.77290000000000
1980-01-01	90.79840000000000
1981-01-01	87.33820000000000
1982-01-01	89.68360000000000
1983-01-01	90.62640000000000
1984-01-01	92.03090000000000
1985-01-01	96.85260000000000
1986-01-01	103.65500000000000
1987-01-01	108.53200000000001
1988-01-01	108.95400000000000
1989-01-01	111.73800000000000
1990-01-01	113.34600000000000
1991-01-01	115.12500000000000
1992-01-01	115.39100000000000
1993-01-01	116.81700000000001
1994-01-01	117.03900000000000
1995-01-01	122.56700000000001
1996-01-01	130.57000000000000
1997-01-01	138.00300000000000
1998-01-01	148.14300000000000
1999-01-01	159.89700000000002
2000-01-01	162.42000000000000
2001-01-01	164.89000000000000
2002-01-01	163.41899999999998
2003-01-01	165.00099999999998
2004-01-01	173.80900000000003
2005-01-01	178.74800000000000
2006-01-01	185.18900000000002
2007-01-01	192.82100000000000
2008-01-01	195.57900000000000
2009-01-01	188.73300000000000
2010-01-01	180.04000000000000
2011-01-01	175.30700000000002
2012-01-01	170.92800000000000
2013-01-01	176.85100000000000
2014-01-01	182.15200000000002
2015-01-01	178.87700000000000
2016-01-01	179.01200000000000