Year	Percent
1960-01-01	198.50900000000001
1961-01-01	210.04900000000000
1962-01-01	216.77599999999998
1963-01-01	223.09000000000000
1964-01-01	199.32200000000000
1965-01-01	174.42300000000000
1966-01-01	170.57900000000000
1967-01-01	175.37800000000000
1968-01-01	164.36700000000002
1969-01-01	142.88000000000000
1970-01-01	136.02900000000000
1971-01-01	146.92100000000000
1972-01-01	170.65000000000000
1973-01-01	186.07000000000000
1974-01-01	175.29000000000000
1975-01-01	176.91400000000002
1976-01-01	169.42800000000000
1977-01-01	153.41200000000000
1978-01-01	156.55800000000000
1979-01-01	182.44099999999997
1980-01-01	219.25900000000001
1981-01-01	231.75099999999998
1982-01-01	230.89600000000000
1983-01-01	234.54900000000000
1984-01-01	217.37500000000000
1985-01-01	182.04500000000000
1986-01-01	165.96700000000000
1987-01-01	173.49900000000002
1988-01-01	180.39700000000002
1989-01-01	177.93900000000002
1990-01-01	181.74599999999998
1991-01-01	182.50700000000000
1992-01-01	169.93800000000000
1993-01-01	159.72400000000000
1994-01-01	128.99400000000000
1995-01-01	101.87799999999999
1996-01-01	101.44200000000001
1997-01-01	105.97500000000000
1998-01-01	112.33700000000000
1999-01-01	108.11200000000001
2000-01-01	107.17600000000000
2001-01-01	114.13200000000000
2002-01-01	106.37299999999999
2003-01-01	94.37760000000000
2004-01-01	92.09970000000000
2005-01-01	91.31210000000000
2006-01-01	88.66320000000000
2007-01-01	87.19410000000000
2008-01-01	88.09620000000000
2009-01-01	88.57740000000000
2010-01-01	84.34350000000000
2011-01-01	74.11820000000000
2012-01-01	69.38780000000000
2013-01-01	73.97240000000000
2014-01-01	77.33400000000000
2015-01-01	80.87580000000000
2016-01-01	84.96660000000000