Year	Percent
1996-01-01	96.207500000000000
1997-01-01	95.413100000000000
1998-01-01	87.935300000000000
1999-01-01	83.584500000000000
2000-01-01	80.543900000000000
2001-01-01	77.308900000000000
2002-01-01	72.930000000000000
2003-01-01	70.490000000000000
2004-01-01	67.467400000000000
2005-01-01	69.158400000000000
2006-01-01	62.845200000000000
2007-01-01	52.749100000000000
2008-01-01	47.707400000000000
2009-01-01	42.092000000000000
2010-01-01	39.053600000000000
2011-01-01	38.571700000000000
2012-01-01	35.077600000000000
2013-01-01	34.689800000000000
2014-01-01	34.001500000000000
2015-01-01	29.038800000000000
2016-01-01	27.508000000000003