Year	Percent
1991-01-01	0.19079800000000000
1992-01-01	0.16077200000000000
1993-01-01	0.23338000000000003
1994-01-01	0.26557600000000003
1995-01-01	0.27619099999999996
1996-01-01	0.31375500000000000
1997-01-01	0.35821800000000000
1998-01-01	0.46544900000000000
1999-01-01	0.46918200000000000
2000-01-01	0.39182300000000000
2001-01-01	0.38524899999999995
2002-01-01	0.39565200000000000
2003-01-01	0.40856600000000000
2004-01-01	0.37662500000000000
2005-01-01	0.27352500000000000
2006-01-01	0.33301500000000000
2007-01-01	0.47428700000000000
2008-01-01	0.47686999999999996
2009-01-01	0.59886900000000000
2010-01-01	0.46952400000000000
2011-01-01	0.41154700000000005
2012-01-01	0.40768100000000000
2013-01-01	0.41805500000000000
2014-01-01	0.39853700000000000
2015-01-01	0.39535700000000000