Year Percent 2000 90.899 2001 91.18772 2002 91.47644 2003 91.76515 2004 92.05387 2005 92.34259 2006 92.63131 2007 92.92002 2008 93.20874 2009 93.49746 2010 93.78618 2011 94.0749 2012 94.36361 2013 94.65233 2014 94.94105 2015 95.22977 2016 95.51848 2017 95.8072 2018 96.09592 2019 96.38464 2020 96.67335 2021 96.96207 2022 97.25079