Year	Percent
1970-01-01	0.10783100000000000
1971-01-01	0.13864700000000000
1972-01-01	0.16431900000000000
1973-01-01	0.17819400000000002
1974-01-01	0.23003600000000002
1975-01-01	0.21779600000000002
1976-01-01	0.24508400000000002
1977-01-01	0.23084000000000002
1978-01-01	0.24822600000000003
1979-01-01	0.26833400000000000
1980-01-01	0.29823099999999997
1981-01-01	0.31521000000000000
1982-01-01	0.30958900000000000
1983-01-01	0.29742900000000000
1984-01-01	0.29073899999999997
1985-01-01	0.29024400000000000
1986-01-01	0.30600800000000000
1987-01-01	0.32241500000000000
1988-01-01	0.33670800000000000
1989-01-01	0.35274500000000000
1990-01-01	0.38136500000000000
1991-01-01	0.44442100000000000
1992-01-01	0.41792500000000000
1993-01-01	0.40391400000000000
1994-01-01	0.41513300000000000
1995-01-01	0.42002600000000000
1996-01-01	0.41487399999999997
1997-01-01	0.43004300000000000
1998-01-01	0.64905800000000000
1999-01-01	0.83329000000000000
2000-01-01	0.91693099999999990
2001-01-01	0.89896599999999990
2002-01-01	0.93043000000000000
2003-01-01	0.95383500000000000
2004-01-01	0.83780400000000010
2005-01-01	0.73252500000000000
2006-01-01	0.74886800000000000
2007-01-01	0.75024799999999990
2008-01-01	0.74132400000000000
2009-01-01	0.77444899999999990
2010-01-01	0.76147800000000000
2011-01-01	0.75355699999999990
2012-01-01	0.73988800000000000
2013-01-01	0.75839400000000000
2014-01-01	0.73298599999999990
2015-01-01	0.74403000000000000
2016-01-01	0.74441400000000000
2017-01-01	0.72084100000000000