Year	Percent
1996-01-01	63.012800000000000
1997-01-01	63.616200000000000
1998-01-01	56.213600000000000
1999-01-01	63.833500000000000
2000-01-01	65.926900000000000
2001-01-01	65.795800000000000
2002-01-01	64.790800000000000
2003-01-01	23.478700000000000
2004-01-01	21.807000000000000
2005-01-01	11.780500000000000
2006-01-01	16.015300000000000
2007-01-01	17.970300000000000
2008-01-01	12.670700000000000
2009-01-01	18.079000000000000
2010-01-01	15.408400000000000
2011-01-01	14.565300000000000
2012-01-01	16.496500000000000
2013-01-01	11.740600000000000
2014-01-01	9.784930000000001
2015-01-01	9.710139999999999
2016-01-01	14.558600000000000