Year	Percent
1992-01-01	0.23272600000000002
1993-01-01	0.29611100000000000
1994-01-01	0.30511700000000000
1995-01-01	0.32444400000000000
1996-01-01	0.36898700000000000
1997-01-01	0.39442600000000000
1998-01-01	0.25794900000000000
1999-01-01	0.26307400000000000
2000-01-01	0.27148800000000000
2001-01-01	0.27339700000000000
2002-01-01	0.27185000000000000
2003-01-01	0.27305400000000000
2004-01-01	0.26643800000000000
2005-01-01	0.25666100000000003
2006-01-01	0.23563800000000001
2007-01-01	0.24055300000000002
2008-01-01	0.23001100000000002
2009-01-01	0.20633900000000000
2010-01-01	0.19509900000000000
2011-01-01	0.19930599999999998
2012-01-01	0.20195700000000000
2013-01-01	0.19881600000000002
2014-01-01	0.20883800000000002
2015-01-01	0.22728400000000000