Year	Percent
1990-01-01	0.12711000000000000
1991-01-01	0.13469500000000000
1992-01-01	0.15514500000000000
1993-01-01	0.16645800000000000
1994-01-01	0.22690500000000002
1995-01-01	0.23599200000000000
1996-01-01	0.17475700000000000
1997-01-01	0.22721999999999998
1998-01-01	0.22716200000000000
1999-01-01	0.21112800000000000
2000-01-01	0.18178400000000000
2001-01-01	0.21209099999999997
2002-01-01	0.22478800000000002
2003-01-01	0.21341900000000000
2004-01-01	0.21432300000000000
2005-01-01	0.21674100000000000
2006-01-01	0.21672399999999997
2007-01-01	0.22193500000000000
2008-01-01	0.21505300000000002
2009-01-01	0.24930200000000000
2010-01-01	0.22855900000000000
2011-01-01	0.23610900000000000
2012-01-01	0.24118600000000000
2013-01-01	0.21195999999999998
2014-01-01	0.18656600000000000
2015-01-01	0.17866100000000000