Year	Percent
1960-01-01	80.523300000000000
1961-01-01	78.640700000000000
1962-01-01	90.140400000000000
1963-01-01	105.936000000000000
1964-01-01	108.609000000000000
1965-01-01	105.907999999999990
1966-01-01	104.542000000000000
1967-01-01	110.514000000000000
1968-01-01	89.285200000000000
1969-01-01	62.916400000000000
1970-01-01	56.570400000000000
1971-01-01	65.081100000000000
1972-01-01	75.752700000000000
1973-01-01	79.486100000000000
1974-01-01	67.901600000000000
1975-01-01	56.302900000000000
1976-01-01	52.690500000000000
1977-01-01	54.318999999999996
1978-01-01	67.086600000000000
1979-01-01	70.471700000000000
1980-01-01	63.718400000000000
1981-01-01	70.287800000000000
1982-01-01	80.199200000000000
1983-01-01	77.951800000000000
1984-01-01	70.748900000000000
1985-01-01	68.619400000000000
1986-01-01	77.636000000000010
1987-01-01	80.060500000000000
1988-01-01	72.439700000000000
1989-01-01	74.089100000000000
1990-01-01	70.550500000000000
1991-01-01	61.218500000000000
1992-01-01	72.948400000000000
1993-01-01	76.834600000000000
1994-01-01	75.400200000000000
1995-01-01	93.637900000000000
1996-01-01	103.782000000000010
1997-01-01	106.767000000000010
1998-01-01	106.335000000000000
1999-01-01	94.700700000000000
2000-01-01	82.373400000000000
2001-01-01	81.576200000000000
2002-01-01	82.100300000000000
2003-01-01	84.245600000000000
2004-01-01	90.430900000000000
2005-01-01	93.570900000000000
2006-01-01	90.285400000000000
2007-01-01	95.260200000000000
2008-01-01	102.176000000000000
2009-01-01	103.908999999999990
2010-01-01	94.940900000000000
2011-01-01	77.200200000000000
2012-01-01	66.278600000000000
2013-01-01	64.471600000000000
2014-01-01	71.996200000000000
2015-01-01	79.380100000000000
2016-01-01	84.903900000000000