Year	Percent
1975-01-01	0.107545000000000000
1976-01-01	0.065676000000000000
1977-01-01	0.045136000000000000
1978-01-01	0.039768000000000000
1979-01-01	0.030781000000000000
1980-01-01	0.096218000000000000
1981-01-01	0.060783000000000004
1982-01-01	0.060398000000000000
1983-01-01	0.062255000000000000
1984-01-01	0.047269000000000000
1985-01-01	0.044823000000000000
1986-01-01	0.003476000000000000
1987-01-01	0.044002000000000000
1988-01-01	0.038183999999999996
1989-01-01	0.075110000000000000
1990-01-01	0.066855000000000000
1991-01-01	0.097524000000000000
1992-01-01	0.120684999999999990
1993-01-01	0.418620000000000000
1994-01-01	0.541419000000000000
1995-01-01	0.570400000000000000
1996-01-01	0.488342000000000000
1997-01-01	0.526336999999999900
1998-01-01	0.737422000000000000
1999-01-01	0.798945000000000000
2000-01-01	0.467236000000000000
2001-01-01	0.463463000000000000
2002-01-01	0.878081999999999900
2003-01-01	0.767771000000000000
2004-01-01	0.654354000000000000
2005-01-01	0.578140000000000000
2006-01-01	0.496487000000000000
2007-01-01	0.505491000000000000
2008-01-01	0.339071000000000000
2009-01-01	0.570006999999999900
2010-01-01	0.410236999999999960
2011-01-01	0.636337000000000000
2012-01-01	0.541644000000000000
2013-01-01	0.546041000000000000
2014-01-01	0.532467000000000000
2015-01-01	0.636012000000000000
2016-01-01	0.650370000000000000
2017-01-01	0.611147000000000000