Year Percent 2000 92.30552 2001 92.57327 2002 92.84392 2003 93.11749 2004 93.51618 2005 93.90362 2006 94.28038 2007 94.64646 2008 95.00229 2009 95.34782 2010 95.68347 2011 96.00932 2012 96.32582 2013 96.63292 2014 96.93103 2015 97.22038 2016 97.50065 2017 97.7723 2018 98.03585 2019 98.29177 2020 98.54059 2021 98.78269 2022 99.01851