Year	Percent
1980-01-01	4.000000000000000
1981-01-01	5.275000000000000
1982-01-01	5.500000000000000
1983-01-01	5.500000000000000
1984-01-01	5.916670000000000
1985-01-01	4.000000000000000
1986-01-01	10.000000000000000
1987-01-01	14.666700000000000
1988-01-01	13.500000000000000
1989-01-01	7.833330000000000
1990-01-01	7.416670000000000
1991-01-01	3.250000000000000
1992-01-01	3.250000000000000
1993-01-01	3.250000000000000
1994-01-01	3.250000000000000
1995-01-01	12.554200000000000
1996-01-01	9.675830000000000
1997-01-01	9.530830000000000
1998-01-01	9.506000000000000
1999-01-01	12.821700000000000
2000-01-01	13.080400000000000
2001-01-01	14.186700000000000
2002-01-01	13.532300000000000
2003-01-01	9.092980000000000
2004-01-01	12.862700000000000
2005-01-01	10.852900000000000
2006-01-01	9.611970000000000
2007-01-01	9.843700000000000
2008-01-01	9.779530000000001
2009-01-01	11.202700000000000
2010-01-01	12.487300000000000
2011-01-01	8.489810000000000
2012-01-01	9.351830000000000
2013-01-01	11.167900000000000
2014-01-01	10.774700000000000
2015-01-01	9.833730000000001
2016-01-01	10.648200000000000