Year	Percent
1962-01-01	0.06493500000000000
1963-01-01	0.06493500000000000
1964-01-01	0.06493500000000000
1965-01-01	0.06493500000000000
1966-01-01	0.06493500000000000
1967-01-01	6.96410000000000000
1968-01-01	7.51406000000000100
1969-01-01	8.42236000000000100
1970-01-01	3.67910000000000000
1971-01-01	0.00578200000000000
1972-01-01	0.00267000000000000
1973-01-01	0.00225500000000000
1974-01-01	0.00118500000000000
1975-01-01	0.00142300000000000
1976-01-01	0.00132800000000000
1977-01-01	0.09752899999999999
1978-01-01	0.67416300000000000
1979-01-01	1.03358000000000000
1980-01-01	1.43579000000000000
1981-01-01	2.03135000000000000
1982-01-01	2.21175000000000000
1983-01-01	3.11320000000000000
1984-01-01	4.75693000000000050
1985-01-01	5.66094000000000000
1986-01-01	6.97730000000000000
1987-01-01	6.74548000000000100
1988-01-01	5.93297000000000000
1989-01-01	5.43176999999999900
1990-01-01	5.29589000000000000
1991-01-01	4.89069000000000000
1992-01-01	5.07564000000000000
1993-01-01	5.12131000000000000
1994-01-01	5.17034000000000000
1995-01-01	5.78293000000000000
1996-01-01	5.83738000000000050
1997-01-01	6.26651000000000000
1998-01-01	6.22870000000000000
1999-01-01	6.06382000000000000
2000-01-01	6.34727000000000000
2001-01-01	6.28715000000000000
2002-01-01	6.54735000000000000
2003-01-01	6.84720000000000000
2004-01-01	7.16081000000000100
2005-01-01	6.43962000000000000
2006-01-01	4.32009000000000000
2007-01-01	2.59746000000000000
2008-01-01	2.43308000000000000
2009-01-01	3.01549000000000020
2010-01-01	3.33515999999999970
2011-01-01	3.14927000000000000
2012-01-01	2.70825999999999970
2013-01-01	2.54343000000000000
2014-01-01	2.46276000000000000
2015-01-01	2.72194000000000000
2016-01-01	2.81846000000000000