Year	Percent
1960-01-01	1.65082000000000020
1961-01-01	1.36424000000000000
1962-01-01	1.03347000000000000
1963-01-01	0.79160100000000000
1964-01-01	0.72664600000000000
1965-01-01	0.79884100000000000
1966-01-01	1.42536000000000000
1967-01-01	2.36670000000000000
1968-01-01	2.35698000000000000
1969-01-01	1.55781000000000010
1970-01-01	1.05257999999999980
1971-01-01	0.85635000000000000
1972-01-01	0.80203900000000010
1973-01-01	0.76738000000000010
1974-01-01	0.89486800000000000
1975-01-01	1.19989000000000000
1976-01-01	1.44839000000000000
1977-01-01	1.49851000000000000
1978-01-01	1.34883000000000000
1979-01-01	1.34067000000000000
1980-01-01	1.55877999999999980
1981-01-01	1.83645999999999980
1982-01-01	1.99741000000000000
1983-01-01	2.19687000000000000
1984-01-01	2.21957000000000000
1985-01-01	1.92422000000000000
1986-01-01	1.70204000000000020
1987-01-01	1.58537000000000020
1988-01-01	1.36912000000000010
1989-01-01	1.19132000000000020
1990-01-01	1.02255000000000000
1991-01-01	0.93138600000000000
1992-01-01	0.97506200000000010
1993-01-01	1.14211000000000000
1994-01-01	1.11089000000000000
1995-01-01	0.93647099999999990
1996-01-01	0.79118400000000000
1997-01-01	0.62913200000000000
1998-01-01	0.52594800000000000
1999-01-01	0.34575500000000003
2000-01-01	0.15455900000000000
2001-01-01	0.07325599999999999
2002-01-01	0.04767100000000000
2003-01-01	0.01359400000000000
2004-01-01	0.00441600000000000
2005-01-01	0.00426200000000000
2006-01-01	0.09341900000000000
2007-01-01	0.20000000000000000
2008-01-01	0.21859600000000000
2009-01-01	0.28950200000000000
2010-01-01	0.31100900000000004
2011-01-01	0.24090500000000000
2012-01-01	0.16762200000000000
2013-01-01	0.13271100000000000
2014-01-01	0.20761000000000000
2015-01-01	1.95394000000000020
2016-01-01	6.21004000000000000