Year	Percent
1960-01-01	102.75600000000000
1961-01-01	98.51580000000000
1962-01-01	101.73000000000000
1963-01-01	106.72000000000000
1964-01-01	107.89500000000000
1965-01-01	107.71900000000000
1966-01-01	95.35500000000000
1967-01-01	88.40580000000000
1968-01-01	84.72880000000000
1969-01-01	87.94650000000000
1970-01-01	85.63080000000000
1971-01-01	80.68840000000000
1972-01-01	70.62170000000000
1973-01-01	58.14470000000000
1974-01-01	54.45399999999999
1975-01-01	51.47670000000000
1976-01-01	46.20230000000000
1977-01-01	47.74750000000000
1978-01-01	47.03150000000000
1979-01-01	37.96150000000000
1980-01-01	39.87050000000000
1981-01-01	46.05610000000000
1982-01-01	49.15750000000000
1983-01-01	57.50700000000000
1984-01-01	44.45690000000000
1985-01-01	38.75650000000000
1986-01-01	36.79740000000000
1987-01-01	36.43820000000000
1988-01-01	50.12320000000000
1989-01-01	65.35120000000000
1990-01-01	73.61160000000000
1991-01-01	64.54470000000000
1992-01-01	63.47160000000000
1993-01-01	60.78760000000000
1994-01-01	53.60630000000000
1995-01-01	52.80570000000000
1996-01-01	57.86350000000000
1997-01-01	52.98940000000000
1998-01-01	49.22800000000000
1999-01-01	51.31320000000000
2000-01-01	48.93600000000001
2001-01-01	50.42100000000001
2002-01-01	53.05940000000000
2003-01-01	53.48080000000000
2004-01-01	55.68850000000000
2005-01-01	56.84700000000000
2006-01-01	61.63060000000000
2007-01-01	64.44650000000000
2008-01-01	69.17110000000000
2009-01-01	73.60250000000000
2010-01-01	72.03420000000000
2011-01-01	77.99200000000000
2012-01-01	83.31230000000000
2013-01-01	80.15690000000000
2014-01-01	78.39100000000000
2015-01-01	79.64460000000000
2016-01-01	79.28390000000000