Year	Percent
1973-01-01	72.57280000000000
1974-01-01	73.70030000000000
1975-01-01	76.94000000000000
1976-01-01	78.13210000000000
1977-01-01	81.15160000000000
1978-01-01	83.99530000000000
1979-01-01	86.28780000000000
1980-01-01	89.11950000000000
1981-01-01	92.99080000000000
1982-01-01	95.81990000000000
1983-01-01	97.41000000000000
1984-01-01	98.64470000000000
1985-01-01	100.31700000000001
1986-01-01	99.26530000000000
1987-01-01	100.30600000000000
1988-01-01	99.29160000000000
1989-01-01	98.30630000000000
1990-01-01	99.95160000000000
1991-01-01	127.02100000000000
1992-01-01	106.45100000000001
1993-01-01	114.52600000000001
1994-01-01	118.62200000000001
1995-01-01	122.88300000000000
1996-01-01	130.02900000000000
1997-01-01	136.04500000000000
1998-01-01	140.62800000000000
1999-01-01	147.42400000000000
2000-01-01	146.79200000000000
2001-01-01	137.88800000000000
2002-01-01	137.33700000000002
2003-01-01	136.25100000000000
2004-01-01	132.69500000000000
2005-01-01	130.09700000000000
2006-01-01	124.70400000000000
2007-01-01	117.60799999999999
2008-01-01	115.16500000000000
2009-01-01	118.67700000000000
2010-01-01	112.38200000000000
2011-01-01	106.57000000000000
2012-01-01	104.26700000000001
2013-01-01	102.34600000000000
2014-01-01	98.81470000000000
2015-01-01	95.94460000000000
2016-01-01	93.41450000000000