Year Percent 2000 93.56416 2001 93.64894 2002 93.8609 2003 94.06872 2004 94.27249 2005 94.47209 2006 94.66775 2007 94.85943 2008 95.04727 2009 95.23118 2010 95.41132 2011 95.58772 2012 95.76049 2013 95.92934 2014 96.09454 2015 96.25616 2016 96.41433 2017 96.56909 2018 96.72061 2019 96.86896 2020 97.01427 2021 97.0203 2022 97.02619