Year	Percent
1962-01-01	5.390510000000000
1963-01-01	7.260680000000001
1964-01-01	7.939189999999999
1965-01-01	8.974700000000000
1966-01-01	9.396960000000000
1967-01-01	9.506240000000000
1968-01-01	12.145100000000000
1969-01-01	13.614800000000000
1970-01-01	13.260200000000000
1971-01-01	10.275000000000000
1972-01-01	12.009600000000000
1973-01-01	13.020600000000000
1974-01-01	9.628830000000000
1975-01-01	12.755999999999998
1976-01-01	18.288200000000000
1977-01-01	27.279100000000000
1978-01-01	33.719100000000000
1979-01-01	28.276500000000000
1980-01-01	32.658100000000000
1981-01-01	48.600200000000000
1982-01-01	73.585200000000000
1983-01-01	82.232700000000000
1984-01-01	77.061000000000000
1985-01-01	78.717300000000000
1986-01-01	99.964400000000000
1987-01-01	87.427400000000000
1988-01-01	98.206700000000000
1989-01-01	81.215500000000000
1990-01-01	81.215500000000000
1991-01-01	43.008900000000000
1992-01-01	26.473300000000000
1993-01-01	23.662900000000000
1994-01-01	25.186300000000000
1995-01-01	29.415100000000000
1996-01-01	33.588200000000000
1997-01-01	44.445300000000000
1998-01-01	61.642800000000000
1999-01-01	57.360100000000000
2000-01-01	47.247000000000000
2001-01-01	57.916400000000000
2002-01-01	62.643100000000000
2003-01-01	60.873000000000005
2004-01-01	58.824700000000000
2005-01-01	52.591400000000000
2006-01-01	52.087900000000000
2007-01-01	59.642900000000000
2008-01-01	61.709900000000000
2009-01-01	85.422900000000000
2010-01-01	78.946100000000000
2011-01-01	63.120100000000000
2012-01-01	57.273100000000000
2013-01-01	59.782800000000000
2014-01-01	67.923999999999990
2015-01-01	97.671100000000000
2016-01-01	105.914000000000000