Year Percent 2000 92.21159 2001 92.22403 2002 92.23647 2003 92.24892 2004 92.26136 2005 92.48491 2006 92.70851 2007 92.93218 2008 93.1559 2009 93.37967 2010 93.60351 2011 93.8274 2012 94.05134 2013 94.27535 2014 94.49941 2015 94.72353 2016 94.9477 2017 95.17194 2018 95.39623 2019 95.62057 2020 95.84497 2021 96.06943 2022 96.06943