Year Percent 2000 82.24806 2001 82.63254 2002 83.0178 2003 83.40384 2004 83.79065 2005 84.17825 2006 84.56663 2007 84.95578 2008 85.34572 2009 85.73643 2010 86.12793 2011 86.5202 2012 86.91325 2013 87.30709 2014 87.7017 2015 88.09709 2016 88.49326 2017 88.89021 2018 89.28794 2019 89.68645 2020 90.08574 2021 90.48581 2022 90.88665