Year	Percent
1999-01-01	81.3887
2000-01-01	85.8477
2001-01-01	85.8477
2002-01-01	85.8477
2003-01-01	85.8477
2004-01-01	81.0402
2005-01-01	80.0059
2006-01-01	71.5517
2007-01-01	68.4267
2008-01-01	65.2778
2009-01-01	61.3225
2010-01-01	45.7373
2011-01-01	26.0870
2012-01-01	59.6465
2013-01-01	60.3374
2014-01-01	60.8772