Year	Percent
1973-01-01	76.33170000000000
1974-01-01	76.58630000000000
1975-01-01	80.32740000000000
1976-01-01	82.33210000000000
1977-01-01	80.05570000000000
1978-01-01	76.13440000000000
1979-01-01	75.47260000000000
1980-01-01	76.73860000000000
1981-01-01	81.27720000000000
1982-01-01	84.91860000000000
1983-01-01	82.23280000000000
1984-01-01	81.51000000000000
1985-01-01	85.50060000000000
1986-01-01	86.11700000000000
1987-01-01	88.06860000000000
1988-01-01	90.93320000000000
1989-01-01	94.75340000000000
1990-01-01	97.15720000000000
1991-01-01	96.81070000000000
1992-01-01	96.43580000000000
1993-01-01	97.32570000000000
1994-01-01	96.88240000000000
1995-01-01	97.01440000000000
1996-01-01	97.67930000000000
1997-01-01	98.32370000000000
1998-01-01	100.67299999999999
1999-01-01	107.28900000000000
2000-01-01	110.84600000000000
2001-01-01	113.20299999999999
2002-01-01	112.29200000000000
2003-01-01	117.10799999999999
2004-01-01	123.56400000000000
2005-01-01	134.92700000000002
2006-01-01	152.69799999999998
2007-01-01	166.11300000000000
2008-01-01	179.50900000000001
2009-01-01	190.11900000000003
2010-01-01	191.03900000000002
2011-01-01	193.42600000000000
2012-01-01	194.33800000000000
2013-01-01	185.79800000000000
2014-01-01	171.73500000000000
2015-01-01	154.67200000000000
2016-01-01	139.82700000000000