Year % 2000 97.12522 2001 99.27187 2002 100 2003 100 2004 100 2005 99.92417 2006 99.35514 2007 99.70188 2008 99.66684 2009 98.81506 2010 98.29375 2011 98.68703 2012 99.81496 2013 100 2014 98.91794 2015 99.42786 2016 99.58184 2017 99.77121