Year	Percent
1960-01-01	103.32700000000001
1961-01-01	99.82330000000000
1962-01-01	89.96010000000000
1963-01-01	87.46850000000000
1964-01-01	90.68450000000000
1965-01-01	87.15870000000000
1966-01-01	82.69920000000000
1967-01-01	84.25050000000000
1968-01-01	86.08590000000000
1969-01-01	91.79760000000000
1970-01-01	93.99970000000000
1971-01-01	87.04020000000000
1972-01-01	74.10120000000000
1973-01-01	76.55500000000000
1974-01-01	77.91700000000000
1975-01-01	78.09560000000000
1976-01-01	81.01650000000000
1977-01-01	76.81170000000000
1978-01-01	77.88150000000000
1979-01-01	88.17410000000000
1980-01-01	90.30630000000000
1981-01-01	89.87810000000000
1982-01-01	91.41410000000000
1983-01-01	91.65420000000000
1984-01-01	92.51440000000000
1985-01-01	91.39780000000000
1986-01-01	88.24380000000000
1987-01-01	82.53780000000000
1988-01-01	79.64699999999999
1989-01-01	78.38180000000000
1990-01-01	78.90600000000000
1991-01-01	70.24600000000001
1992-01-01	62.79450000000000
1993-01-01	69.07310000000000
1994-01-01	77.68230000000000
1995-01-01	84.41270000000000
1996-01-01	88.57180000000000
1997-01-01	88.53900000000000
1998-01-01	87.83300000000000
1999-01-01	86.27840000000000
2000-01-01	81.78970000000000
2001-01-01	80.80160000000000
2002-01-01	79.11880000000000
2003-01-01	72.12840000000000
2004-01-01	69.05820000000000
2005-01-01	72.88810000000000
2006-01-01	78.99050000000000
2007-01-01	82.82590000000000
2008-01-01	83.42450000000000
2009-01-01	79.20600000000000
2010-01-01	73.96930000000000
2011-01-01	72.93010000000000
2012-01-01	74.68230000000000
2013-01-01	75.78680000000000
2014-01-01	73.87260000000000
2015-01-01	71.21600000000001
2016-01-01	72.23390000000000