Year	Percent
1960-01-01	52.03070000000000
1961-01-01	56.91470000000000
1962-01-01	62.39010000000000
1963-01-01	67.58000000000000
1964-01-01	69.81560000000000
1965-01-01	69.45630000000000
1966-01-01	70.25870000000000
1967-01-01	69.72550000000000
1968-01-01	66.00640000000000
1969-01-01	62.88320000000000
1970-01-01	64.72420000000000
1971-01-01	66.87720000000000
1972-01-01	65.41560000000000
1973-01-01	69.19580000000000
1974-01-01	63.33800000000000
1975-01-01	56.44090000000000
1976-01-01	55.98250000000000
1977-01-01	56.94140000000000
1978-01-01	60.30220000000000
1979-01-01	63.22210000000000
1980-01-01	68.36560000000000
1981-01-01	71.99030000000000
1982-01-01	72.43150000000000
1983-01-01	75.26700000000000
1984-01-01	78.45960000000000
1985-01-01	81.32830000000000
1986-01-01	80.37650000000000
1987-01-01	77.18770000000000
1988-01-01	77.12680000000000
1989-01-01	78.82300000000001
1990-01-01	95.32260000000000
1991-01-01	127.66600000000000
1992-01-01	122.43000000000000
1993-01-01	110.36700000000000
1994-01-01	107.18100000000000
1995-01-01	115.71100000000000
1996-01-01	126.57400000000000
1997-01-01	136.66000000000000
1998-01-01	137.26600000000000
1999-01-01	124.52500000000000
2000-01-01	114.07100000000000
2001-01-01	106.36300000000000
2002-01-01	101.07700000000001
2003-01-01	99.96500000000000
2004-01-01	96.75080000000000
2005-01-01	96.12130000000000
2006-01-01	95.02410000000000
2007-01-01	91.71220000000000
2008-01-01	90.09730000000000
2009-01-01	88.11220000000000
2010-01-01	87.97410000000000
2011-01-01	87.98350000000000
2012-01-01	88.12630000000000
2013-01-01	90.31370000000000
2014-01-01	92.80390000000000
2015-01-01	96.57180000000000
2016-01-01	100.44900000000000