Year Percent 2000 84.22039 2001 84.26292 2002 84.8945 2003 85.52668 2004 86.15945 2005 86.79281 2006 87.42677 2007 88.06132 2008 88.69647 2009 89.33221 2010 89.96855 2011 90.60548 2012 91.243 2013 91.88112 2014 92.51984 2015 93.15914 2016 93.79904 2017 94.43954 2018 95.08063 2019 95.72231 2020 96.36459 2021 96.36459 2022 96.36459