Year % 1998 92.10132 1999 99.88019 2001 100 2004 100 2005 100 2006 97.05156 2007 94.72428 2008 99.59234 2009 100 2010 100 2011 96.90951 2012 100 2013 99.94336 2014 100 2015 100 2016 100