Year	Percent
1960-01-01	252.49300000000000
1961-01-01	241.36200000000000
1962-01-01	220.74000000000000
1963-01-01	221.78599999999997
1964-01-01	247.14200000000000
1965-01-01	259.92200000000000
1966-01-01	238.80700000000002
1967-01-01	188.67900000000000
1968-01-01	194.90800000000000
1969-01-01	203.51500000000000
1970-01-01	193.61000000000000
1971-01-01	186.81200000000000
1972-01-01	188.45300000000000
1973-01-01	194.25799999999998
1974-01-01	196.23000000000000
1975-01-01	194.52900000000002
1976-01-01	173.57200000000000
1977-01-01	159.25400000000000
1978-01-01	170.78900000000002
1979-01-01	190.11400000000000
1980-01-01	211.12700000000000
1981-01-01	226.53200000000000
1982-01-01	218.61000000000000
1983-01-01	199.40000000000000
1984-01-01	187.33599999999998
1985-01-01	184.52200000000002
1986-01-01	180.88200000000000
1987-01-01	175.09000000000000
1988-01-01	179.25900000000001
1989-01-01	174.88099999999997
1990-01-01	165.61800000000000
1991-01-01	154.34500000000000
1992-01-01	149.31900000000000
1993-01-01	163.61300000000000
1994-01-01	144.25700000000000
1995-01-01	106.75600000000000
1996-01-01	100.94700000000000
1997-01-01	98.87330000000000
1998-01-01	96.03810000000000
1999-01-01	92.35220000000000
2000-01-01	96.50510000000000
2001-01-01	98.43980000000000
2002-01-01	91.91430000000000
2003-01-01	86.04240000000000
2004-01-01	81.23200000000000
2005-01-01	85.14120000000000
2006-01-01	88.85290000000000
2007-01-01	85.08550000000000
2008-01-01	89.07050000000000
2009-01-01	90.09170000000000
2010-01-01	84.65450000000000
2011-01-01	87.79010000000000
2012-01-01	92.66970000000000
2013-01-01	94.90330000000000
2014-01-01	94.11290000000000
2015-01-01	89.66220000000000
2016-01-01	87.86100000000000