Year	Percent
1960-01-01	172.67100000000000
1961-01-01	187.46099999999998
1962-01-01	181.74800000000000
1963-01-01	180.26000000000000
1964-01-01	203.50099999999998
1965-01-01	202.15500000000000
1966-01-01	171.82000000000000
1967-01-01	162.01800000000000
1968-01-01	152.37600000000000
1969-01-01	147.84200000000000
1970-01-01	152.43000000000000
1971-01-01	137.69400000000000
1972-01-01	135.78400000000000
1973-01-01	152.86600000000000
1974-01-01	151.66299999999998
1975-01-01	145.31400000000000
1976-01-01	153.87000000000000
1977-01-01	162.47100000000000
1978-01-01	159.65300000000000
1979-01-01	202.38299999999998
1980-01-01	221.44000000000000
1981-01-01	197.70100000000000
1982-01-01	190.08900000000003
1983-01-01	186.73100000000000
1984-01-01	164.02599999999998
1985-01-01	155.34900000000000
1986-01-01	165.26400000000000
1987-01-01	167.21099999999998
1988-01-01	184.85600000000000
1989-01-01	188.59000000000000
1990-01-01	139.11100000000000
1991-01-01	87.06480000000000
1992-01-01	70.98330000000000
1993-01-01	51.88910000000000
1994-01-01	45.50250000000000
1995-01-01	42.45940000000000
1996-01-01	45.67310000000000
1997-01-01	42.30440000000000
1998-01-01	41.33070000000000
1999-01-01	62.38240000000000
2000-01-01	74.79430000000000
2001-01-01	68.50860000000000
2002-01-01	66.02080000000000
2003-01-01	75.83930000000000
2004-01-01	84.16330000000000
2005-01-01	88.65660000000000
2006-01-01	90.55300000000000
2007-01-01	86.63060000000000
2008-01-01	85.01910000000000
2009-01-01	84.38170000000000
2010-01-01	82.97540000000000
2011-01-01	84.05040000000000
2012-01-01	86.27510000000000
2013-01-01	86.03320000000000
2014-01-01	81.25480000000000
2015-01-01	73.04980000000000
2016-01-01	69.17900000000000