Year	Percent
1960-01-01	1.84919000000000010
1961-01-01	2.29830000000000000
1962-01-01	4.40731999999999950
1963-01-01	6.62500000000000000
1964-01-01	8.47775000000000000
1965-01-01	8.35009000000000000
1966-01-01	8.83019000000000000
1967-01-01	8.38482000000000000
1968-01-01	7.13141000000000100
1969-01-01	7.04445000000000000
1970-01-01	5.21203000000000000
1971-01-01	4.42446000000000000
1972-01-01	3.68303000000000050
1973-01-01	3.44900000000000000
1974-01-01	3.07445999999999970
1975-01-01	2.58702000000000000
1976-01-01	2.27417000000000020
1977-01-01	1.95990000000000000
1978-01-01	1.81229000000000020
1979-01-01	1.53022000000000010
1980-01-01	1.20122000000000020
1981-01-01	1.04652000000000010
1982-01-01	1.14954000000000000
1983-01-01	1.14954000000000000
1984-01-01	1.14954000000000000
1985-01-01	1.14954000000000000
1986-01-01	1.14954000000000000
1987-01-01	0.79397100000000000
1988-01-01	0.63598800000000000
1989-01-01	0.48929700000000004
1990-01-01	0.49731400000000003
1991-01-01	0.60839700000000010
1992-01-01	0.70844700000000000
1993-01-01	0.74485700000000000
1994-01-01	0.62461200000000000
1995-01-01	0.48197100000000000
1996-01-01	0.45290699999999995
1997-01-01	0.35421100000000000
1998-01-01	0.31619600000000000
1999-01-01	0.36989700000000000
2000-01-01	0.43994900000000000
2001-01-01	0.51515100000000000
2002-01-01	0.49474700000000005
2003-01-01	0.32585200000000000
2004-01-01	0.22174000000000002
2005-01-01	0.21483000000000002
2006-01-01	0.34909200000000000
2007-01-01	0.34378200000000003
2008-01-01	0.19250899999999999
2009-01-01	0.17449400000000000
2010-01-01	0.14414200000000002
2011-01-01	0.12996600000000000
2012-01-01	0.47426000000000000
2013-01-01	1.00812000000000010
2014-01-01	0.89368600000000010
2015-01-01	0.39469099999999996
2016-01-01	0.53765600000000000