Year	Percent
1996-01-01	83.814200000000000
1997-01-01	72.009300000000000
1998-01-01	70.877200000000000
1999-01-01	68.759700000000000
2000-01-01	55.479400000000000
2001-01-01	44.510300000000000
2002-01-01	32.751999999999995
2003-01-01	57.469400000000000
2004-01-01	56.963600000000000
2005-01-01	68.290100000000000
2006-01-01	57.700700000000000
2007-01-01	62.724900000000000
2008-01-01	61.504500000000000
2009-01-01	62.113100000000000
2010-01-01	63.917300000000000
2011-01-01	64.589100000000000
2012-01-01	65.850300000000000
2013-01-01	65.810700000000000
2014-01-01	65.443800000000000
2015-01-01	69.396200000000000
2016-01-01	69.195600000000000