Year	Percent
1997-01-01	100.00000000000000
1998-01-01	79.77502000000000
1999-01-01	78.97665000000000
2000-01-01	78.00751000000000
2001-01-01	87.68404000000000
2002-01-01	87.33009000000000
2003-01-01	86.04330999999999
2004-01-01	84.13400000000000
2005-01-01	100.00000000000000
2006-01-01	100.00000000000000
2007-01-01	100.00000000000000
2008-01-01	100.00000000000000
2009-01-01	100.00000000000000
2010-01-01	100.00000000000000
2011-01-01	100.00000000000000
2012-01-01	100.00000000000000
2013-01-01	100.00000000000000