Year	Percent
1996-01-01	78.734100000000000
1997-01-01	73.552400000000000
1998-01-01	47.604800000000000
1999-01-01	48.312200000000000
2000-01-01	63.304400000000000
2001-01-01	64.694100000000000
2002-01-01	74.966600000000000
2003-01-01	63.033500000000000
2004-01-01	60.802300000000000
2005-01-01	62.721000000000004
2006-01-01	57.680000000000000
2007-01-01	58.269700000000000
2008-01-01	44.144200000000000
2009-01-01	46.519500000000000
2010-01-01	57.770100000000000
2011-01-01	58.544800000000000
2012-01-01	63.965800000000000
2013-01-01	65.632000000000000
2014-01-01	60.580200000000000