Year Percent 2000 87.43149 2001 88.08196 2002 88.7325 2003 89.38311 2004 90.0338 2005 90.68455 2006 91.33538 2007 91.98628 2008 92.63725 2009 93.28828 2010 93.93748 2011 94.58761 2012 95.23855 2013 95.89019 2014 96.5423 2015 97.17559 2016 97.58454 2017 97.99258 2018 98.39929 2019 98.40055 2020 98.40196 2021 98.40351 2022 98.40523