Year	Percent
1960-01-01	3.35836000000000000
1961-01-01	3.92875000000000000
1962-01-01	4.54724000000000000
1963-01-01	4.28566000000000000
1964-01-01	3.67220999999999980
1965-01-01	3.25060000000000000
1966-01-01	3.07323000000000000
1967-01-01	3.09222000000000000
1968-01-01	2.77700999999999980
1969-01-01	2.44888000000000000
1970-01-01	1.93017000000000020
1971-01-01	1.75483000000000000
1972-01-01	1.53918000000000000
1973-01-01	1.44241000000000000
1974-01-01	1.41087000000000000
1975-01-01	1.58338000000000000
1976-01-01	1.48430000000000000
1977-01-01	1.17198000000000000
1978-01-01	1.22036000000000010
1979-01-01	1.18110000000000000
1980-01-01	1.18175000000000000
1981-01-01	1.32326000000000000
1982-01-01	1.29792000000000000
1983-01-01	1.26331000000000000
1984-01-01	1.22592000000000010
1985-01-01	1.08955000000000000
1986-01-01	1.07806000000000000
1987-01-01	1.09480000000000000
1988-01-01	1.01310000000000000
1989-01-01	0.97536700000000000
1990-01-01	0.91047400000000000
1991-01-01	1.06674000000000000
1992-01-01	0.91213099999999990
1993-01-01	0.90411800000000000
1994-01-01	0.76347100000000000
1995-01-01	0.69341100000000000
1996-01-01	0.64900700000000000
1997-01-01	0.63028100000000010
1998-01-01	0.61618100000000010
1999-01-01	0.42396600000000000
2000-01-01	0.21652800000000003
2001-01-01	0.20204600000000000
2002-01-01	0.20105200000000000
2003-01-01	0.19988699999999998
2004-01-01	0.19544000000000000
2005-01-01	0.19235700000000000
2006-01-01	0.18525100000000000
2007-01-01	0.17646300000000000
2008-01-01	0.17392800000000000
2009-01-01	0.17992400000000000
2010-01-01	0.17167200000000000
2011-01-01	0.16459500000000000
2012-01-01	0.16130000000000000
2013-01-01	0.16078299999999998
2014-01-01	0.15875100000000000
2015-01-01	1.53793999999999990
2016-01-01	5.22321999999999950