Year Percent 2000 93.50291 2001 93.50291 2002 93.96461 2003 94.42631 2004 94.88801 2005 95.34971 2006 95.81141 2007 96.27311 2008 96.73481 2009 97.19651 2010 97.65821 2011 98.11992 2012 98.58162 2013 99.04332 2014 99.3237 2015 99.3237 2016 99.3237 2017 99.3237 2018 99.3237 2019 99.3237 2020 99.3237 2021 99.3237 2022 99.3237