Year	Percent
1997-01-01	0.09570000000000000
1998-01-01	0.16470700000000000
1999-01-01	0.16760600000000000
2000-01-01	0.16760600000000000
2001-01-01	0.16760600000000000
2002-01-01	0.16760600000000000
2003-01-01	0.09829199999999999
2004-01-01	0.18282300000000000
2005-01-01	0.20228100000000000
2006-01-01	0.12205000000000000
2007-01-01	0.08139500000000001
2008-01-01	0.07127300000000000
2009-01-01	0.24459299999999998
2010-01-01	0.27500900000000000
2011-01-01	0.16007800000000000
2012-01-01	0.16564600000000002