Year Percent 2000 92.20424 2001 92.56262 2002 92.9208 2003 93.27878 2004 93.63657 2005 93.99416 2006 94.35155 2007 94.70875 2008 95.06575 2009 95.42255 2010 95.77916 2011 96.13558 2012 96.49179 2013 97.37035 2014 97.75326 2015 98.13618 2016 98.51909 2017 98.87517 2018 98.87517 2019 98.87517 2020 98.87517 2021 98.87517 2022 98.87517