Year Percent 2000 91.63258 2001 91.67004 2002 91.7075 2003 91.74495 2004 92.15475 2005 92.56485 2006 92.97526 2007 93.38597 2008 93.79699 2009 94.20831 2010 94.61993 2011 95.03186 2012 95.44409 2013 95.85662 2014 96.26946 2015 96.6826 2016 97.09605 2017 97.5098 2018 97.92385 2019 98.33821 2020 98.75287 2021 99.16784 2022 99.58045