Year Percent 2000 73.30946 2001 74.33923 2002 75.369 2003 76.39877 2004 77.42854 2005 78.45831 2006 79.48808 2007 80.51786 2008 81.54763 2009 82.5774 2010 83.60717 2011 84.63694 2012 85.66671 2013 86.69649 2014 87.72626 2015 88.75603 2016 89.16366 2017 90.81557 2018 91.84534 2019 93.1241 2020 95.94526 2021 97.98709 2022 97.98709