Year	Percent
1995-01-01	65.3672592275000
1996-01-01	65.6627315275000
1997-01-01	65.9651779200000
1998-01-01	66.3599285950000
1999-01-01	65.7967306850000
2000-01-01	64.4575099425000
2001-01-01	65.2477356800000
2002-01-01	67.2753233750000
2003-01-01	66.3650359075000
2004-01-01	65.9981463600000
2005-01-01	65.6150157075000
2006-01-01	65.3028262975000
2007-01-01	65.8647438550000
2008-01-01	66.7449699475000
2009-01-01	66.3173355975000
2010-01-01	66.3202135025000
2011-01-01	67.8578747950000
2012-01-01	51.4166666666667
2013-01-01	51.8250000000000
2014-01-01	51.4500000000000
2015-01-01	52.0333333333333
2016-01-01	52.0583333333333
2017-01-01	51.9833333333333