Year	Percent
1996-01-01	72.035400000000000
1997-01-01	66.346400000000000
1998-01-01	60.335500000000000
1999-01-01	60.904300000000000
2000-01-01	55.434400000000000
2001-01-01	53.820500000000000
2002-01-01	56.660200000000000
2003-01-01	53.317600000000000
2004-01-01	51.216200000000000
2005-01-01	51.050700000000000
2006-01-01	53.468100000000000
2007-01-01	54.120700000000000
2008-01-01	56.346900000000000
2009-01-01	64.502700000000000
2010-01-01	59.038900000000000
2011-01-01	55.594500000000000
2012-01-01	56.943000000000005
2013-01-01	55.445700000000000
2014-01-01	54.373000000000005