Year	Percent
1964-01-01	69.32270000000000
1965-01-01	66.64770000000000
1966-01-01	71.52460000000000
1967-01-01	80.36430000000000
1968-01-01	80.55310000000000
1969-01-01	70.25010000000000
1970-01-01	70.01720000000000
1971-01-01	76.98000000000000
1972-01-01	78.63500000000000
1973-01-01	79.16860000000000
1974-01-01	113.12600000000000
1975-01-01	104.34200000000001
1976-01-01	58.57500000000000
1977-01-01	54.43920000000000
1978-01-01	66.75330000000000
1979-01-01	103.40000000000000
1980-01-01	124.53200000000001
1981-01-01	147.08600000000000
1982-01-01	151.25900000000000
1983-01-01	108.02500000000000
1984-01-01	75.46410000000000
1985-01-01	51.37010000000000
1986-01-01	53.19920000000000
1987-01-01	60.74350000000000
1988-01-01	65.62880000000000
1989-01-01	72.77220000000000
1990-01-01	81.67650000000000
1991-01-01	92.42140000000000
1992-01-01	96.93290000000000
1993-01-01	111.90500000000000
1994-01-01	112.18200000000000
1995-01-01	99.60340000000000
1996-01-01	101.51400000000000
1997-01-01	102.54700000000001
1998-01-01	119.41700000000000
1999-01-01	125.12700000000001
2000-01-01	129.86500000000000
2001-01-01	137.17700000000002
2002-01-01	131.17000000000000
2003-01-01	118.97500000000000
2004-01-01	107.24700000000001
2005-01-01	93.51060000000000
2006-01-01	80.56970000000000
2007-01-01	76.93690000000000
2008-01-01	71.28370000000000
2009-01-01	70.62560000000000
2010-01-01	78.84670000000000
2011-01-01	92.36430000000000
2012-01-01	100.38500000000000
2013-01-01	95.71430000000000
2014-01-01	91.23420000000000
2015-01-01	89.00320000000000
2016-01-01	88.74530000000000