Year	Percent
1962-01-01	0.05785900000000000000
1963-01-01	0.21639000000000000000
1964-01-01	0.41669700000000004000
1965-01-01	0.36400000000000000000
1966-01-01	0.49916800000000006000
1967-01-01	0.23024699999999998000
1968-01-01	0.09546500000000000000
1969-01-01	0.00127300000000000000
1970-01-01	0.00022200000000000003
1971-01-01	0.00020200000000000000
1972-01-01	0.00054700000000000000
1973-01-01	0.00030600000000000000
1974-01-01	0.00030600000000000000
1975-01-01	0.00030600000000000000
1976-01-01	0.00021200000000000000
1977-01-01	0.33987900000000000000
1978-01-01	0.79265800000000000000
1979-01-01	1.01280000000000000000
1980-01-01	1.09715000000000000000
1981-01-01	1.10846000000000000000
1982-01-01	1.44006000000000010000
1983-01-01	1.90899000000000020000
1984-01-01	2.16410000000000000000
1985-01-01	1.92219000000000000000
1986-01-01	1.75717000000000010000
1987-01-01	2.02166000000000000000
1988-01-01	2.20931000000000000000
1989-01-01	2.11374000000000000000
1990-01-01	2.20168000000000000000
1991-01-01	2.36655000000000000000
1992-01-01	2.50483000000000000000
1993-01-01	2.70619000000000030000
1994-01-01	3.59325000000000000000
1995-01-01	4.26011000000000000000
1996-01-01	4.40701999999999900000
1997-01-01	4.84857000000000000000
1998-01-01	5.38915000000000000000
1999-01-01	5.36135000000000000000
2000-01-01	5.51609000000000000000
2001-01-01	5.31347000000000000000
2002-01-01	5.11173000000000060000
2003-01-01	4.45786000000000000000
2004-01-01	3.82340000000000000000
2005-01-01	3.28946000000000000000
2006-01-01	2.23336000000000000000
2007-01-01	1.26803000000000000000
2008-01-01	1.15764000000000000000
2009-01-01	1.81398000000000000000
2010-01-01	2.27867000000000000000
2011-01-01	2.14515000000000000000
2012-01-01	2.24240000000000000000
2013-01-01	2.38117000000000000000
2014-01-01	2.21331000000000000000
2015-01-01	2.03463000000000000000
2016-01-01	1.92009000000000000000