Year	Percent
1960-01-01	86.949200000000000
1961-01-01	92.142500000000000
1962-01-01	94.678200000000000
1963-01-01	94.196400000000000
1964-01-01	98.759300000000000
1965-01-01	129.290000000000000
1966-01-01	149.847999999999980
1967-01-01	142.416000000000000
1968-01-01	133.159000000000000
1969-01-01	124.572000000000000
1970-01-01	126.039000000000000
1971-01-01	126.569000000000000
1972-01-01	116.622999999999990
1973-01-01	101.704000000000000
1974-01-01	88.001100000000000
1975-01-01	73.793300000000000
1976-01-01	65.252500000000000
1977-01-01	65.252500000000000
1978-01-01	65.252500000000000
1979-01-01	65.252500000000000
1980-01-01	65.252500000000000
1981-01-01	65.252500000000000
1982-01-01	65.252500000000000
1983-01-01	65.252500000000000
1984-01-01	65.252500000000000
1985-01-01	65.252500000000000
1986-01-01	65.252500000000000
1987-01-01	65.252500000000000
1988-01-01	65.252500000000000
1989-01-01	65.252500000000000
1990-01-01	65.252500000000000
1991-01-01	65.252500000000000
1992-01-01	65.252500000000000
1993-01-01	65.252500000000000
1994-01-01	65.252500000000000
1995-01-01	65.252500000000000
1996-01-01	65.252500000000000
1997-01-01	65.252500000000000
1998-01-01	65.252500000000000
1999-01-01	65.252500000000000
2000-01-01	65.252500000000000
2001-01-01	65.252500000000000
2002-01-01	65.252500000000000
2003-01-01	65.252500000000000
2004-01-01	9.224020000000000
2005-01-01	21.207500000000000
2006-01-01	27.134200000000000
2007-01-01	23.616200000000000
2008-01-01	22.323100000000000
2009-01-01	21.238000000000003
2010-01-01	22.044300000000000
2011-01-01	24.686800000000000
2012-01-01	28.913800000000000
2013-01-01	32.076100000000000
2014-01-01	31.962100000000000
2015-01-01	35.214000000000000
2016-01-01	40.026300000000000