Year	Percent
1960-01-01	1.64214000000000020
1961-01-01	0.94127800000000010
1962-01-01	0.41952399999999995
1963-01-01	0.40375200000000000
1964-01-01	0.45341600000000000
1965-01-01	0.57976500000000000
1966-01-01	0.69503200000000000
1967-01-01	0.51372800000000000
1968-01-01	0.31876700000000000
1969-01-01	0.29389200000000000
1970-01-01	0.18523000000000000
1971-01-01	0.17720600000000000
1972-01-01	0.14104100000000000
1973-01-01	0.16923000000000000
1974-01-01	0.41313800000000000
1975-01-01	0.85598800000000000
1976-01-01	1.38294000000000000
1977-01-01	1.76109000000000000
1978-01-01	2.41215000000000000
1979-01-01	3.17195000000000000
1980-01-01	3.77040000000000000
1981-01-01	3.74356999999999960
1982-01-01	4.63500000000000000
1983-01-01	7.11198000000000000
1984-01-01	8.49371000000000000
1985-01-01	9.27122000000000000
1986-01-01	10.04810000000000000
1987-01-01	9.21082000000000000
1988-01-01	7.68617000000000000
1989-01-01	8.03108999999999900
1990-01-01	8.68942000000000000
1991-01-01	7.85323000000000000
1992-01-01	6.65159000000000000
1993-01-01	6.63057000000000000
1994-01-01	6.09795000000000000
1995-01-01	6.73841000000000100
1996-01-01	7.22073999999999900
1997-01-01	6.85788000000000100
1998-01-01	6.99306000000000100
1999-01-01	6.07365000000000000
2000-01-01	5.69359000000000000
2001-01-01	4.94832000000000000
2002-01-01	4.96810000000000000
2003-01-01	3.93294000000000030
2004-01-01	2.49102000000000020
2005-01-01	2.71387000000000000
2006-01-01	2.69650000000000000
2007-01-01	3.01080000000000000
2008-01-01	3.15863000000000000
2009-01-01	2.70012000000000000
2010-01-01	2.76374000000000030
2011-01-01	2.72448000000000000
2012-01-01	2.27904000000000000
2013-01-01	1.81415999999999980
2014-01-01	1.50197999999999990
2015-01-01	1.17557999999999980
2016-01-01	0.96412700000000010