Year Percent 2000 92.02592 2001 92.36828 2002 92.71065 2003 93.05301 2004 93.39537 2005 93.73774 2006 94.0801 2007 94.42246 2008 94.76483 2009 95.10719 2010 95.44955 2011 95.79191 2012 96.13428 2013 96.33039 2014 96.51886 2015 96.70626 2016 96.89257 2017 97.0778 2018 97.26194 2019 97.44499 2020 97.62696 2021 97.80785 2022 97.98765