Year Percent 2000 96.61398 2001 96.61398 2002 96.61398 2003 96.61398 2004 96.61398 2005 96.74091 2006 96.88505 2007 97.02924 2008 97.17347 2009 97.31775 2010 97.46207 2011 97.60643 2012 97.75084 2013 97.8953 2014 98.0398 2015 98.18434 2016 98.32894 2017 98.47357 2018 98.61825 2019 98.76298 2020 98.90775 2021 99.05257 2022 99.19743