Year Percent 2000 57.94882 2001 57.94882 2002 57.94882 2003 57.94882 2004 57.94882 2005 59.41949 2006 60.88359 2007 62.34111 2008 63.79205 2009 65.23641 2010 66.67419 2011 68.10539 2012 69.53001 2013 70.94806 2014 72.35952 2015 73.7644 2016 75.1627 2017 76.55443 2018 77.93957 2019 79.31814 2020 79.31814 2021 79.31814 2022 79.31814