Year	Percent
1980-01-01	0.385276000000000000
1981-01-01	0.411699000000000000
1982-01-01	0.411699000000000000
1983-01-01	0.411699000000000000
1984-01-01	0.411699000000000000
1985-01-01	0.411699000000000000
1986-01-01	0.411699000000000000
1987-01-01	0.411699000000000000
1988-01-01	0.411699000000000000
1989-01-01	0.411699000000000000
1990-01-01	0.411699000000000000
1991-01-01	0.411699000000000000
1992-01-01	0.411699000000000000
1993-01-01	0.411699000000000000
1994-01-01	0.411699000000000000
1995-01-01	0.411699000000000000
1996-01-01	0.411699000000000000
1997-01-01	0.411699000000000000
1998-01-01	0.411699000000000000
1999-01-01	0.411699000000000000
2000-01-01	0.411699000000000000
2001-01-01	0.036157999999999996
2002-01-01	0.075728000000000000
2003-01-01	0.187098000000000010
2004-01-01	0.309168000000000000
2005-01-01	0.277393000000000000
2006-01-01	0.239344999999999970
2007-01-01	0.222136000000000000
2008-01-01	0.183786999999999980
2009-01-01	0.163640000000000000
2010-01-01	0.144170000000000000
2011-01-01	0.103830999999999990
2012-01-01	0.081646000000000010
2013-01-01	0.066190000000000000
2014-01-01	0.052383000000000006
2015-01-01	0.051717999999999990
2016-01-01	0.046851000000000000