Year	Percent
1982-01-01	5.900000000000000
1983-01-01	4.800000000000000
1984-01-01	5.900000000000000
1985-01-01	6.375000000000000
1986-01-01	6.416670000000000
1987-01-01	5.925000000000000
1988-01-01	6.750000000000000
1989-01-01	6.850000000000000
1990-01-01	8.275000000000000
1991-01-01	10.425000000000000
1992-01-01	9.341670000000000
1993-01-01	10.458300000000000
1994-01-01	13.116700000000000
1995-01-01	14.983300000000000
1996-01-01	13.041700000000000
1997-01-01	10.783300000000000
1998-01-01	12.110000000000000
1999-01-01	10.186700000000000
2000-01-01	10.890000000000000
2001-01-01	9.287500000000000
2002-01-01	8.946750000000000
2003-01-01	9.320330000000000
2004-01-01	8.781670000000000
2005-01-01	7.933580000000000
2006-01-01	8.105000000000000
2007-01-01	8.821670000000000
2008-01-01	8.445830000000000
2009-01-01	8.628330000000000
2010-01-01	9.050970000000000
2011-01-01	10.375400000000000
2012-01-01	9.515780000000000
2013-01-01	8.433440000000000
2014-01-01	9.789539999999999
2015-01-01	10.957200000000000
2016-01-01	10.687700000000000