Year Percent 2000 98.47197 2001 98.51213 2002 98.55228 2003 98.59244 2004 98.6326 2005 98.65612 2006 98.67962 2007 98.70312 2008 98.72659 2009 98.75006 2010 98.77351 2011 98.79695 2012 98.82037 2013 98.84378 2014 98.86718 2015 98.86718 2016 98.86718 2017 98.86718 2018 98.86718 2019 98.86718 2020 98.86718 2021 98.86718 2022 98.86718