Year	Percent
1961-01-01	41.811800000000000
1962-01-01	44.036300000000000
1963-01-01	49.528000000000000
1964-01-01	59.905200000000000
1965-01-01	52.844800000000000
1966-01-01	53.879400000000000
1967-01-01	52.756500000000000
1968-01-01	58.022700000000000
1969-01-01	54.030300000000000
1970-01-01	55.930200000000000
1971-01-01	55.092700000000000
1972-01-01	58.123100000000000
1973-01-01	61.968999999999994
1974-01-01	78.762000000000000
1975-01-01	96.858500000000000
1976-01-01	82.780800000000000
1977-01-01	77.076600000000000
1978-01-01	73.667400000000000
1979-01-01	69.144200000000000
1980-01-01	67.775900000000000
1981-01-01	68.288700000000000
1982-01-01	68.472500000000000
1983-01-01	71.126700000000000
1984-01-01	67.994400000000000
1985-01-01	68.930500000000000
1986-01-01	69.724500000000000
1987-01-01	70.060900000000000
1988-01-01	86.988600000000000
1989-01-01	103.525000000000000
1990-01-01	106.847000000000010
1991-01-01	116.988000000000000
1992-01-01	116.149000000000000
1993-01-01	126.303000000000000
1994-01-01	129.690000000000000
1995-01-01	126.427000000000000
1996-01-01	136.031000000000000
1997-01-01	144.250000000000000
1998-01-01	146.612000000000000
1999-01-01	153.051000000000020
2000-01-01	159.587000000000020
2001-01-01	164.128000000000000
2002-01-01	174.738000000000000
2003-01-01	176.960000000000000
2004-01-01	173.090999999999980
2005-01-01	174.357000000000000
2006-01-01	183.838000000000000
2007-01-01	197.910000000000000
2008-01-01	204.102999999999980
2009-01-01	211.500999999999980
2010-01-01	226.790000000000000
2011-01-01	240.291000000000000
2012-01-01	242.053000000000000
2013-01-01	224.750999999999980
2014-01-01	197.507999999999980
2015-01-01	198.410999999999970
2016-01-01	206.147000000000020