Year	Percent
1996-01-01	90.89090000000000
1997-01-01	92.50810000000000
1998-01-01	91.84740000000000
1999-01-01	92.09180000000000
2000-01-01	87.53410000000000
2001-01-01	96.64350000000000
2002-01-01	97.91780000000000
2003-01-01	99.41180000000000
2004-01-01	77.04760000000000
2005-01-01	74.20760000000000
2006-01-01	77.58720000000000
2007-01-01	77.73290000000000
2008-01-01	79.46370000000000
2009-01-01	78.27700000000000
2010-01-01	78.78010000000000
2011-01-01	77.32600000000001
2012-01-01	76.21010000000000
2013-01-01	74.42140000000000
2014-01-01	74.93490000000000
2015-01-01	74.57720000000000
2016-01-01	72.81210000000000