Year Percent 2000 72.42015 2001 73.63895 2002 74.85658 2003 76.07305 2004 77.28835 2005 78.50248 2006 79.71545 2007 80.92725 2008 82.13788 2009 83.34734 2010 84.55564 2011 85.76277 2012 86.96873 2013 88.17353 2014 89.37716 2015 90.57962 2016 91.78091 2017 92.98104 2018 94.18 2019 95.37779 2020 96.57441 2021 96.57441 2022 96.57441