Year Percent 2000 94.27112 2001 94.43126 2002 94.59595 2003 94.76325 2004 94.9845 2005 95.20603 2006 95.42532 2007 95.64326 2008 95.85991 2009 96.07522 2010 96.28588 2011 96.49601 2012 96.70564 2013 96.91479 2014 97.12344 2015 97.27865 2016 97.43325 2017 97.58724 2018 97.73629 2019 97.7416 2020 97.74272 2021 97.74395 2022 97.7453