Year	Percent
1996-01-01	84.063700000000000
1997-01-01	54.140100000000000
1998-01-01	45.645400000000000
1999-01-01	48.747200000000000
2000-01-01	52.262600000000000
2001-01-01	52.012500000000000
2002-01-01	49.257000000000000
2003-01-01	51.738400000000000
2004-01-01	48.753600000000000
2005-01-01	53.258100000000000
2006-01-01	55.798000000000000
2007-01-01	56.539800000000000
2008-01-01	55.236999999999995
2009-01-01	45.200100000000000
2010-01-01	46.010000000000000
2011-01-01	41.028999999999996
2012-01-01	34.565400000000000
2013-01-01	34.583800000000000
2014-01-01	33.070900000000000