Year Percent 2000 94.07395 2001 94.07395 2002 94.07395 2003 94.07395 2004 94.07395 2005 94.15404 2006 94.40915 2007 94.66455 2008 94.92025 2009 95.17625 2010 95.43255 2011 95.68914 2012 95.94603 2013 96.20322 2014 96.46071 2015 96.71849 2016 96.97658 2017 97.23496 2018 97.49363 2019 97.75261 2020 98.01188 2021 98.27145 2022 98.27145