Year Percent 2000 95.5635 2001 95.60416 2002 95.79388 2003 95.98373 2004 96.1737 2005 96.3638 2006 96.55403 2007 96.74438 2008 96.93486 2009 97.12547 2010 97.3162 2011 97.50706 2012 97.69805 2013 97.88916 2014 98.0804 2015 98.27177 2016 98.46326 2017 98.65488 2018 98.84663 2019 99.03851 2020 99.23051 2021 99.50126 2022 99.50126