Year Percent 2000 85.39265 2001 85.76486 2002 86.13757 2003 86.51078 2004 86.88447 2005 87.25866 2006 87.63334 2007 88.00852 2008 88.38418 2009 88.76034 2010 89.137 2011 89.51414 2012 89.89178 2013 90.26992 2014 90.64854 2015 91.02766 2016 91.40727 2017 91.78737 2018 92.16797 2019 92.54906 2020 92.93064 2021 93.31272 2022 93.61695