Year Percent 2000 89.06166 2001 89.52978 2002 89.99603 2003 90.45994 2004 90.92175 2005 91.35679 2006 91.7905 2007 92.22517 2008 92.66098 2009 93.09809 2010 93.53617 2011 93.9754 2012 94.41575 2013 94.85725 2014 95.3014 2015 95.7477 2016 96.19546 2017 96.64411 2018 97.09311 2019 97.54177 2020 97.98963 2021 97.99113 2022 97.99301