Year Percent 2000 90.65907 2001 90.65907 2002 90.65907 2003 90.65907 2004 91.22466 2005 91.79041 2006 92.35631 2007 92.92237 2008 93.48858 2009 94.05495 2010 94.62147 2011 95.18815 2012 95.75498 2013 96.32197 2014 96.88911 2015 97.45641 2016 98.02386 2017 98.59147 2018 99.15923 2019 99.72715 2020 99.86234 2021 99.8763 2022 99.89027