Year Percent 2000 95.09769 2001 95.20977 2002 95.3218 2003 95.43379 2004 95.54574 2005 95.65764 2006 95.7695 2007 95.88132 2008 95.9931 2009 96.10483 2010 96.21652 2011 96.32816 2012 96.43976 2013 96.55132 2014 96.66283 2015 96.79069 2016 96.91854 2017 97.0464 2018 97.17425 2019 97.30211 2020 97.42996 2021 97.55782 2022 97.68567