Year	Percent
1996-01-01	90.747200000000000
1997-01-01	91.199800000000000
1998-01-01	90.715100000000000
1999-01-01	89.646800000000000
2000-01-01	91.247100000000000
2001-01-01	89.418600000000000
2002-01-01	87.577800000000000
2003-01-01	72.915100000000000
2004-01-01	73.923999999999990
2005-01-01	65.386300000000000
2006-01-01	56.839500000000000
2007-01-01	53.089800000000000
2008-01-01	50.556999999999995
2009-01-01	49.160200000000000
2010-01-01	46.397400000000000
2011-01-01	49.642800000000000
2012-01-01	46.825600000000000
2013-01-01	46.030100000000000
2014-01-01	45.535100000000000
2015-01-01	47.669300000000000
2016-01-01	48.295100000000000