Year	Percent
1996-01-01	39.922300000000000
1997-01-01	42.242200000000000
1998-01-01	41.851700000000000
1999-01-01	41.435700000000000
2000-01-01	39.236400000000000
2001-01-01	40.249700000000000
2002-01-01	55.759600000000000
2003-01-01	55.230500000000000
2004-01-01	54.656000000000006
2005-01-01	55.979800000000000
2006-01-01	55.192200000000000
2007-01-01	53.292000000000000
2008-01-01	58.268500000000000
2009-01-01	59.836600000000000
2010-01-01	47.055800000000000
2011-01-01	46.254000000000000
2012-01-01	43.769600000000000
2013-01-01	43.006200000000000
2014-01-01	41.683000000000000
2015-01-01	42.582900000000000
2016-01-01	43.190300000000000