Year	Percent
1997-01-01	100.0000
1998-01-01	100.0000
1999-01-01	100.0000
2000-01-01	100.0000
2001-01-01	100.0000
2002-01-01	100.0000
2003-01-01	82.7714
2004-01-01	82.5517
2005-01-01	81.0961
2006-01-01	81.0216
2007-01-01	82.7753
2008-01-01	81.3723
2009-01-01	87.9107
2010-01-01	84.1182
2011-01-01	82.2937
2012-01-01	82.8913
2013-01-01	83.9026
2014-01-01	85.8156
2015-01-01	87.4164
2016-01-01	100.0000