Year	Percent
1960-01-01	238.05300000000000
1961-01-01	276.89200000000000
1962-01-01	295.01800000000000
1963-01-01	282.01900000000000
1964-01-01	323.27000000000000
1965-01-01	346.54100000000000
1966-01-01	350.42699999999996
1967-01-01	375.96200000000000
1968-01-01	379.96000000000000
1969-01-01	384.79699999999997
1970-01-01	318.43900000000000
1971-01-01	261.91500000000000
1972-01-01	276.51800000000000
1973-01-01	282.15400000000000
1974-01-01	244.70400000000000
1975-01-01	306.75300000000000
1976-01-01	312.71700000000000
1977-01-01	254.72099999999998
1978-01-01	249.80800000000000
1979-01-01	298.31200000000000
1980-01-01	360.42400000000004
1981-01-01	322.54100000000000
1982-01-01	276.72100000000000
1983-01-01	249.82700000000000
1984-01-01	202.94299999999998
1985-01-01	235.78300000000000
1986-01-01	279.35700000000000
1987-01-01	274.79200000000003
1988-01-01	197.10100000000000
1989-01-01	114.55200000000000
1990-01-01	118.37700000000001
1991-01-01	134.92200000000000
1992-01-01	146.61400000000000
1993-01-01	166.47600000000000
1994-01-01	141.51200000000000
1995-01-01	103.04200000000000
1996-01-01	101.29400000000000
1997-01-01	96.42790000000000
1998-01-01	98.40000000000000
1999-01-01	105.65299999999999
2000-01-01	94.35120000000000
2001-01-01	83.53810000000000
2002-01-01	80.03920000000000
2003-01-01	87.00090000000000
2004-01-01	93.46450000000000
2005-01-01	93.65370000000000
2006-01-01	68.58800000000001
2007-01-01	57.71660000000000
2008-01-01	69.63860000000000
2009-01-01	81.03830000000000
2010-01-01	82.36399999999999
2011-01-01	81.40030000000000
2012-01-01	89.30980000000000
2013-01-01	95.50140000000000
2014-01-01	97.70040000000000
2015-01-01	98.88980000000000