Year Percent 2000 93.10424 2001 93.28163 2002 93.45575 2003 93.62669 2004 93.79449 2005 93.95906 2006 94.12057 2007 94.27904 2008 94.43452 2009 94.58699 2010 94.73658 2011 94.88071 2012 95.02211 2013 95.16127 2014 95.2983 2015 95.4332 2016 95.56602 2017 95.69194 2018 95.81885 2019 95.88023 2020 95.93881 2021 95.9947 2022 95.99614