Year	Percent
1996-01-01	72.788700000000000
1997-01-01	74.986100000000000
1998-01-01	73.882000000000000
1999-01-01	72.152000000000000
2000-01-01	67.007200000000000
2001-01-01	83.454700000000000
2002-01-01	54.722100000000000
2003-01-01	91.581600000000000
2004-01-01	66.727500000000000
2005-01-01	62.858999999999995
2006-01-01	61.515000000000000
2007-01-01	66.580900000000000
2008-01-01	66.706800000000000
2009-01-01	56.670100000000000
2010-01-01	59.508999999999990
2011-01-01	60.110700000000000
2012-01-01	57.169800000000000
2013-01-01	54.181000000000004
2014-01-01	51.248999999999995