Year Percent 2000 95.24043 2001 95.35878 2002 95.47714 2003 95.59551 2004 95.7139 2005 95.8323 2006 95.95071 2007 96.06913 2008 96.18756 2009 96.30601 2010 96.42446 2011 96.54293 2012 96.66141 2013 96.7799 2014 96.89841 2015 97.01692 2016 97.13545 2017 97.25398 2018 97.36753 2019 97.48107 2020 97.59461 2021 97.70815 2022 97.8217