Year Percent 2000 94.51544 2001 94.51544 2002 94.78104 2003 95.04665 2004 95.31225 2005 95.55652 2006 95.80068 2007 96.04471 2008 96.28863 2009 96.53242 2010 96.7761 2011 97.01966 2012 97.26311 2013 97.50643 2014 97.74963 2015 97.99272 2016 98.20722 2017 98.16219 2018 98.1173 2019 98.07255 2020 99.18491 2021 99.18491 2022 99.18491