Year Percent 2000 95.33218 2001 95.58796 2002 95.85912 2003 96.13686 2004 96.41666 2005 96.69846 2006 96.9824 2007 97.26837 2008 97.55648 2009 97.84664 2010 98.13891 2011 98.43331 2012 98.72982 2013 99.02892 2014 99.32488 2015 99.52456 2016 99.52935 2017 99.53441 2018 99.91483 2019 99.92817 2020 99.94152 2021 99.95489 2022 99.9683