Year	Percent
1996-01-01	51.978000000000000
1997-01-01	54.643500000000000
1998-01-01	43.016700000000000
1999-01-01	46.886200000000000
2000-01-01	48.541600000000000
2001-01-01	52.179800000000000
2002-01-01	54.047600000000000
2003-01-01	45.269700000000000
2004-01-01	39.559100000000000
2005-01-01	32.983600000000000
2006-01-01	25.948000000000000
2007-01-01	15.851200000000000
2008-01-01	12.701700000000000
2009-01-01	14.836600000000000
2010-01-01	9.816070000000000
2011-01-01	9.813300000000000
2012-01-01	6.590210000000001
2013-01-01	8.571539999999999
2014-01-01	13.380500000000000
2015-01-01	13.813500000000000
2016-01-01	13.205200000000000