Year	Percent
1996-01-01	53.261200000000000
1997-01-01	56.109300000000000
1998-01-01	52.655300000000000
1999-01-01	52.916700000000000
2000-01-01	52.040800000000000
2001-01-01	49.666700000000000
2002-01-01	59.803900000000000
2003-01-01	74.611400000000000
2004-01-01	60.541600000000000
2005-01-01	63.428400000000000
2006-01-01	61.236000000000004
2007-01-01	86.623100000000000
2008-01-01	66.978900000000000
2009-01-01	78.389600000000000
2010-01-01	74.420900000000000
2011-01-01	60.837200000000000
2012-01-01	65.453300000000000
2013-01-01	66.482000000000000
2014-01-01	66.779500000000000