Year	Percent
1999-01-01	83.333300000000000
2000-01-01	72.222200000000000
2001-01-01	57.692300000000000
2002-01-01	48.717900000000000
2003-01-01	32.258100000000000
2004-01-01	38.983000000000004
2005-01-01	44.067800000000000
2006-01-01	41.538500000000000
2007-01-01	39.024400000000000
2008-01-01	32.432400000000000
2009-01-01	42.105300000000000
2010-01-01	45.454500000000000
2011-01-01	48.913000000000004
2012-01-01	50.000000000000000
2013-01-01	46.938800000000000
2014-01-01	48.514900000000000