Year Percent 2000 92.51458 2001 92.83862 2002 93.16267 2003 93.48672 2004 93.81076 2005 94.13481 2006 94.45886 2007 94.7829 2008 95.30799 2009 95.83445 2010 96.36228 2011 96.89147 2012 97.42204 2013 97.95398 2014 98.48728 2015 98.92925 2016 99.13489 2017 99.34053 2018 99.54617 2019 99.75181 2020 99.75181 2021 99.75181 2022 99.75181