Year	Percent
1996-01-01	90.33800000000000
1997-01-01	79.24380000000000
1998-01-01	75.65330000000000
1999-01-01	87.31100000000000
2000-01-01	87.36660000000000
2001-01-01	85.65700000000001
2002-01-01	87.51260000000000
2003-01-01	87.06560000000000
2004-01-01	86.62470000000000
2005-01-01	76.05180000000000
2006-01-01	77.53630000000000
2007-01-01	80.34530000000000
2008-01-01	80.58020000000000
2009-01-01	82.99410000000000
2010-01-01	83.96440000000000
2011-01-01	84.31000000000000
2012-01-01	84.72990000000000
2013-01-01	88.51620000000000
2014-01-01	88.58040000000000
2015-01-01	88.34320000000000
2016-01-01	89.52300000000000