Year	Percent
1960-01-01	8.613130000000000
1961-01-01	8.614260000000000
1962-01-01	8.731420000000000
1963-01-01	9.232560000000001
1964-01-01	7.853930000000000
1965-01-01	10.603600000000000
1966-01-01	13.181200000000000
1967-01-01	13.297800000000000
1968-01-01	11.896200000000000
1969-01-01	12.226900000000000
1970-01-01	12.419800000000000
1971-01-01	11.445800000000000
1972-01-01	11.747200000000000
1973-01-01	10.729900000000000
1974-01-01	6.078310000000000
1975-01-01	6.241980000000000
1976-01-01	5.766650000000000
1977-01-01	5.766650000000000
1978-01-01	5.766650000000000
1979-01-01	5.766650000000000
1980-01-01	5.766650000000000
1981-01-01	5.766650000000000
1982-01-01	5.766650000000000
1983-01-01	5.766650000000000
1984-01-01	5.766650000000000
1985-01-01	5.766650000000000
1986-01-01	5.766650000000000
1987-01-01	5.766650000000000
1988-01-01	5.766650000000000
1989-01-01	5.766650000000000
1990-01-01	5.766650000000000
1991-01-01	5.766650000000000
1992-01-01	5.766650000000000
1993-01-01	5.766650000000000
1994-01-01	5.766650000000000
1995-01-01	5.766650000000000
1996-01-01	5.766650000000000
1997-01-01	5.766650000000000
1998-01-01	5.766650000000000
1999-01-01	5.766650000000000
2000-01-01	5.766650000000000
2001-01-01	5.766650000000000
2002-01-01	5.766650000000000
2003-01-01	5.766650000000000
2004-01-01	5.766650000000000
2005-01-01	5.766650000000000
2006-01-01	2.259040000000000
2007-01-01	2.172350000000000
2008-01-01	2.228170000000000
2009-01-01	3.512090000000000
2010-01-01	4.176780000000000
2011-01-01	4.704530000000000
2012-01-01	5.323259999999999
2013-01-01	5.907750000000000
2014-01-01	6.472340000000000
2015-01-01	8.846410000000000
2016-01-01	9.596770000000000