Year Percent 1995 95.08201 2002 97.85613 2003 95.58256 2004 95.95292 2005 99.56291 2006 98.39621 2007 92.95444 2008 92.23703 2009 94.10357 2010 91.3398 2011 91.9755 2012 89.33528 2013 93.34652 2014 91.56123 2015 90.75882