Year Percent 2000 92.29962 2001 92.29962 2002 92.56702 2003 92.83443 2004 93.10184 2005 93.4672 2006 93.83309 2007 94.19954 2008 94.56653 2009 94.93404 2010 95.3014 2011 95.66838 2012 96.03471 2013 96.40026 2014 96.76477 2015 97.12802 2016 97.43364 2017 97.54907 2018 97.66373 2019 97.77771 2020 97.89104 2021 97.87836 2022 97.86457