Year	Percent
1960-01-01	43.13370000000000
1961-01-01	38.67060000000000
1962-01-01	48.74600000000000
1963-01-01	61.28040000000000
1964-01-01	61.67920000000000
1965-01-01	65.46520000000000
1966-01-01	65.94970000000000
1967-01-01	64.45980000000000
1968-01-01	62.90000000000000
1969-01-01	62.47350000000000
1970-01-01	75.15710000000000
1971-01-01	98.07470000000000
1972-01-01	106.37500000000000
1973-01-01	105.90500000000000
1974-01-01	106.36200000000001
1975-01-01	108.96900000000000
1976-01-01	113.36100000000000
1977-01-01	117.33000000000000
1978-01-01	121.40000000000000
1979-01-01	125.12000000000000
1980-01-01	130.23200000000000
1981-01-01	133.58600000000000
1982-01-01	140.10000000000000
1983-01-01	146.85700000000000
1984-01-01	150.01600000000000
1985-01-01	151.42500000000000
1986-01-01	157.52700000000002
1987-01-01	165.36700000000002
1988-01-01	167.62400000000002
1989-01-01	171.67300000000000
1990-01-01	173.31400000000002
1991-01-01	173.50900000000001
1992-01-01	176.51300000000000
1993-01-01	182.35600000000000
1994-01-01	187.26200000000000
1995-01-01	190.19700000000000
1996-01-01	192.43500000000000
1997-01-01	199.38900000000000
1998-01-01	209.51700000000000
1999-01-01	218.64000000000000
2000-01-01	219.79700000000000
2001-01-01	201.88500000000000
2002-01-01	183.95400000000000
2003-01-01	185.30599999999998
2004-01-01	184.42500000000000
2005-01-01	183.74099999999999
2006-01-01	182.90900000000002
2007-01-01	180.41900000000000
2008-01-01	187.11599999999999
2009-01-01	200.40900000000002
2010-01-01	200.17900000000000
2011-01-01	208.45100000000000
2012-01-01	212.44200000000000
2013-01-01	213.92100000000000
2014-01-01	217.56500000000000
2015-01-01	215.52700000000002
2016-01-01	218.22500000000000