Year	Percent
1973-01-01	61.28520000000000
1974-01-01	63.05040000000000
1975-01-01	62.66900000000000
1976-01-01	63.26360000000000
1977-01-01	63.80750000000000
1978-01-01	60.30160000000000
1979-01-01	60.66090000000000
1980-01-01	62.82430000000000
1981-01-01	68.04600000000000
1982-01-01	71.40020000000000
1983-01-01	72.08850000000000
1984-01-01	73.92330000000000
1985-01-01	70.03750000000000
1986-01-01	62.92300000000000
1987-01-01	61.16520000000000
1988-01-01	59.93970000000000
1989-01-01	58.84650000000000
1990-01-01	57.24700000000000
1991-01-01	65.00110000000000
1992-01-01	72.60140000000000
1993-01-01	75.86020000000000
1994-01-01	77.59940000000000
1995-01-01	81.52820000000000
1996-01-01	86.23940000000000
1997-01-01	87.87250000000000
1998-01-01	91.75180000000000
1999-01-01	103.29100000000000
2000-01-01	118.84700000000001
2001-01-01	119.64200000000001
2002-01-01	120.09899999999999
2003-01-01	123.78900000000000
2004-01-01	123.67100000000000
2005-01-01	125.68900000000000
2006-01-01	132.29200000000000
2007-01-01	139.81400000000000
2008-01-01	152.39900000000000
2009-01-01	164.54800000000000
2010-01-01	169.52800000000000
2011-01-01	177.19299999999998
2012-01-01	180.24599999999998
2013-01-01	169.57400000000000
2014-01-01	157.27900000000000
2015-01-01	143.94899999999998
2016-01-01	134.52100000000002