Year	Percent
1961-01-01	305.58799999999997
1962-01-01	77.56740000000000
1963-01-01	80.01840000000000
1964-01-01	106.44300000000000
1965-01-01	103.26799999999999
1966-01-01	97.58570000000000
1967-01-01	92.29620000000000
1968-01-01	86.11910000000000
1969-01-01	78.35830000000000
1970-01-01	73.79650000000000
1971-01-01	59.96240000000000
1972-01-01	51.45460000000000
1973-01-01	40.69240000000000
1974-01-01	43.60750000000000
1975-01-01	67.30030000000000
1976-01-01	79.00720000000000
1977-01-01	122.74300000000000
1978-01-01	143.47100000000000
1979-01-01	143.31000000000000
1980-01-01	162.40300000000000
1981-01-01	183.56099999999998
1982-01-01	208.58000000000000
1983-01-01	232.24000000000000
1984-01-01	245.23800000000000
1985-01-01	226.34500000000000
1986-01-01	196.52100000000000
1987-01-01	177.55100000000000
1988-01-01	161.79800000000000
1989-01-01	157.44400000000000
1990-01-01	152.12000000000000
1991-01-01	136.54800000000000
1992-01-01	132.39000000000000
1993-01-01	138.14100000000000
1994-01-01	143.59799999999998
1995-01-01	146.05800000000000
1996-01-01	144.51200000000000
1997-01-01	136.34600000000000
1998-01-01	127.68200000000000
1999-01-01	122.11900000000000
2000-01-01	122.32300000000000
2001-01-01	128.18500000000000
2002-01-01	131.45700000000000
2003-01-01	135.88700000000000
2004-01-01	138.36900000000000
2005-01-01	135.13100000000000
2006-01-01	133.43800000000000
2007-01-01	135.16700000000000
2008-01-01	138.59400000000000
2009-01-01	153.38600000000000
2010-01-01	169.18800000000000
2011-01-01	164.91099999999997
2012-01-01	160.46900000000000
2013-01-01	156.19799999999998
2014-01-01	153.40800000000000
2015-01-01	149.75600000000000
2016-01-01	146.76600000000000