Year Percent 2000 95.34697 2001 95.34648 2002 95.42082 2003 95.49952 2004 95.57958 2005 95.65943 2006 95.73908 2007 95.81851 2008 95.89774 2009 95.97666 2010 96.05548 2011 96.13409 2012 96.21385 2013 96.29457 2014 96.37634 2015 96.45889 2016 96.5422 2017 96.62618 2018 96.71065 2019 96.79553 2020 96.88072 2021 96.96613 2022 97.0516