Year Percent 2000 79.71446 2001 79.71446 2002 79.71446 2003 79.71446 2004 79.71446 2005 80.16894 2006 80.66157 2007 81.15464 2008 81.64814 2009 82.14206 2010 82.63642 2011 83.13121 2012 83.62643 2013 84.12208 2014 84.61815 2015 85.11466 2016 85.6116 2017 86.10897 2018 86.60677 2019 87.105 2020 87.60366 2021 88.10275 2022 88.60227