Year	Percent
1998-01-01	100.0000
1999-01-01	100.0000
2000-01-01	99.2076
2001-01-01	99.2417
2002-01-01	98.7487
2003-01-01	81.2159
2004-01-01	99.4421
2005-01-01	100.0000
2006-01-01	97.8734
2007-01-01	72.2121
2008-01-01	64.4102
2009-01-01	74.0293
2010-01-01	84.0478
2011-01-01	88.9283
2012-01-01	90.6993
2013-01-01	94.3188