Year Percent 2000 95.10498 2001 95.10498 2002 95.10498 2003 95.33833 2004 95.57168 2005 95.80503 2006 96.03839 2007 96.27174 2008 96.50509 2009 96.73844 2010 96.9718 2011 97.20515 2012 97.4385 2013 97.67185 2014 97.90521 2015 98.13856 2016 98.37191 2017 98.60526 2018 98.83862 2019 99.07197 2020 99.30532 2021 99.53867 2022 99.53867