Year	Percent
1960-01-01	0.72458100000000000
1961-01-01	0.79444399999999990
1962-01-01	0.82797199999999990
1963-01-01	1.24946000000000000
1964-01-01	1.32813999999999990
1965-01-01	1.02781000000000010
1966-01-01	0.99974699999999990
1967-01-01	0.98847000000000010
1968-01-01	1.05867999999999980
1969-01-01	1.21359000000000000
1970-01-01	1.11527000000000000
1971-01-01	0.84508900000000000
1972-01-01	0.64926800000000010
1973-01-01	0.55064799999999990
1974-01-01	0.41695600000000005
1975-01-01	0.59902600000000010
1976-01-01	0.69874200000000000
1977-01-01	0.82608700000000010
1978-01-01	0.88450800000000000
1979-01-01	0.99730400000000010
1980-01-01	1.03487000000000020
1981-01-01	0.84401000000000000
1982-01-01	1.20102999999999980
1983-01-01	1.25843000000000000
1984-01-01	1.03496000000000000
1985-01-01	1.10351000000000000
1986-01-01	0.60449500000000000
1987-01-01	0.69332100000000000
1988-01-01	1.08384000000000000
1989-01-01	2.22745999999999980
1990-01-01	7.29008999999999900
1991-01-01	8.75348000000000000
1992-01-01	6.54805000000000000
1993-01-01	6.01379000000000000
1994-01-01	5.82846999999999900
1995-01-01	6.21971000000000000
1996-01-01	4.61911000000000000
1997-01-01	3.28470000000000000
1998-01-01	2.10315000000000000
1999-01-01	1.74017999999999980
2000-01-01	1.35883000000000000
2001-01-01	1.21028999999999990
2002-01-01	1.25380000000000000
2003-01-01	1.03342000000000000
2004-01-01	0.53542400000000000
2005-01-01	0.62179700000000000
2006-01-01	0.42188300000000000
2007-01-01	0.77267500000000000
2008-01-01	0.62411500000000000
2009-01-01	0.62815400000000000
2010-01-01	1.53052000000000000
2011-01-01	4.92789000000000050
2012-01-01	9.04992000000000000
2013-01-01	13.66370000000000000