Year	Percent
1960-01-01	49.583900000000000
1961-01-01	49.951800000000000
1962-01-01	50.931500000000000
1963-01-01	50.545800000000000
1964-01-01	50.336900000000000
1965-01-01	48.835800000000000
1966-01-01	54.212100000000000
1967-01-01	54.245200000000000
1968-01-01	55.291100000000000
1969-01-01	57.038000000000004
1970-01-01	50.423900000000000
1971-01-01	49.809500000000000
1972-01-01	51.915700000000000
1973-01-01	52.036000000000000
1974-01-01	51.238800000000000
1975-01-01	52.089800000000000
1976-01-01	51.783100000000000
1977-01-01	50.159100000000000
1978-01-01	49.524900000000000
1979-01-01	49.681900000000000
1980-01-01	48.201800000000000
1981-01-01	48.100300000000000
1982-01-01	48.699700000000000
1983-01-01	48.427700000000000
1984-01-01	49.691500000000000
1985-01-01	54.338300000000000
1986-01-01	64.120300000000000
1987-01-01	71.123000000000000
1988-01-01	76.806700000000000
1989-01-01	77.275000000000000
1990-01-01	77.739200000000000
1991-01-01	74.870900000000000
1992-01-01	72.806200000000000
1993-01-01	70.548999999999990
1994-01-01	68.190100000000000
1995-01-01	67.128100000000000
1996-01-01	66.396600000000000
1997-01-01	69.288200000000000
1998-01-01	76.838000000000010
1999-01-01	76.667100000000000
2000-01-01	70.411800000000000
2001-01-01	75.946300000000000
2002-01-01	81.402600000000000
2003-01-01	84.148000000000000
2004-01-01	82.056400000000000
2005-01-01	82.450300000000000
2006-01-01	86.320800000000000
2007-01-01	96.046800000000000
2008-01-01	108.137000000000000
2009-01-01	128.297000000000000
2010-01-01	124.073000000000000
2011-01-01	122.148000000000000
2012-01-01	120.607000000000010
2013-01-01	122.201000000000010
2014-01-01	125.731000000000010
2015-01-01	134.490000000000000
2016-01-01	142.884000000000000