Year	Percent
1960-01-01	82.08090000000000
1961-01-01	102.10799999999999
1962-01-01	126.52400000000000
1963-01-01	114.95100000000001
1964-01-01	100.68400000000000
1965-01-01	98.58790000000000
1966-01-01	101.90799999999999
1967-01-01	88.42380000000000
1968-01-01	83.52470000000000
1969-01-01	87.33740000000000
1970-01-01	86.45140000000000
1971-01-01	115.12500000000000
1972-01-01	107.14299999999999
1973-01-01	92.30770000000000
1974-01-01	90.95240000000000
1975-01-01	98.80950000000000
1976-01-01	88.24560000000000
1977-01-01	84.67180000000000
1978-01-01	87.18730000000000
1979-01-01	93.59680000000000
1980-01-01	101.81400000000000
1981-01-01	136.67500000000000
1982-01-01	178.65599999999998
1983-01-01	166.97500000000000
1984-01-01	138.18000000000000
1985-01-01	127.28500000000000
1986-01-01	112.26100000000001
1987-01-01	113.13600000000001
1988-01-01	97.50510000000000
1989-01-01	263.75700000000000
1990-01-01	195.65000000000000
1991-01-01	170.27000000000000
1992-01-01	153.45400000000000
1993-01-01	131.38800000000000
1994-01-01	121.05400000000000
1995-01-01	122.99700000000001
1996-01-01	115.46500000000000
1997-01-01	102.64299999999999
1998-01-01	98.03350000000000
1999-01-01	94.16810000000000
2000-01-01	87.55610000000000
2001-01-01	84.63620000000000
2002-01-01	75.28040000000000
2003-01-01	55.39110000000000
2004-01-01	45.25940000000000
2005-01-01	47.08890000000000
2006-01-01	53.01240000000000
2007-01-01	59.32380000000000
2008-01-01	65.73540000000000
2009-01-01	67.06780000000000
2010-01-01	65.95190000000000
2011-01-01	72.81750000000000
2012-01-01	77.24450000000000
2013-01-01	77.55680000000000
2014-01-01	74.32480000000000
2015-01-01	69.84110000000000
2016-01-01	63.75230000000000